36,998 results on '"Plant Pathology"'
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2. Response of Septoria (Zymoseptoria tritici) isolates with Qi and Qo mutations under multiple fungicide selection
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Plant Pathology, Physiology, and Weed Science, Langston, David, Baudoin, Antonius B., Yao, Chenglin, Howard, Jaema, Plant Pathology, Physiology, and Weed Science, Langston, David, Baudoin, Antonius B., Yao, Chenglin, and Howard, Jaema
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Inatreq, active ingredient fenpicoxamid, is a new QiI fungicide product brought to the market by Corteva Agriscience for strong activity against Septoria (Z. tritici). This study examines the interaction between Qo and Qi mutant Septoria isolates to confirm negative cross-resistance between the two sites. And to observe the change in sensitivity of the isolates in a mixed population over several generations and under multiple rates of fungicide selection. Initial growth rate and fitness isolates were determined for four isolate strains; wildtype (IPO323), G37V single mutation (WF.2.44), G143A single mutation (37- 16), and G37V-G143A double mutation (716.3F.2.2). Initial IC50 values were determined for several fungicides in multiple fungicide groups, QiIs, QoIs, Azoles, SDHIs to confirm negative cross-resistance and determine concentrations needed for fungicide treatments. A mixed population trial was then conducted with a 6-rate dose response for three fungicide treatments; Inatreq (QiI), pyraclostrobin (QoI), and a 1:1 mix of Inatreq and pyraclostrobin. It was suspected that throughout 6 generations, sensitivity of single mutant isolates to the opposite fungicide site inhibitor would increase. The double mutation isolate would become more sensitive under fungicide selection than the single mutant isolates. The results of the study confirmed this hypothesis of negative cross-resistance between fungicide groups. Qo single mutant isolate was determined resistant to QoI fungicide but sensitive to QiI fungicides, and the opposite found true for the Qi single mutant. The double mutant isolate was sensitive to both fungicide groups, with increased sensitivity than the single mutants. Under double fungicide selection, all mutant strains were sensitive to the treatment, with increased sensitivity than under single fungicide selection.
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- 2024
3. Evaluation of Triticum aestivum L. germplasm against Puccinia striiformis and its management through botanicals
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Binyamin Plant Pathology
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Wheat is the staple food of Pakistan and country facing wheat shortage during recent years leading to food security issue. Rust diseases of wheat are significantly important causing major dent in wheat production during last season’s due to drastic climate change. Therefore, wheat germplasm was screened against wheat stripe rust during two consecutive years. Out of one hundred and five genotypes not even one showed immune response during 2018-19, 22 genotypes showed highly resistant response, 19 showed resistance response, 42 showed moderately resistance response and remaining genotypes showed susceptible response except five lines (CB-10, CB-65, CB-95, CB-84 and CB-31) that showed heterogeneous characters. Likewise, during 2019-20, 18 genotypes showed highly resistant response, 23 showed resistant response, 39 were moderately resistance and remaining genotypes showed susceptible response except four lines (CB-10, CB-65, CB-95 and CB-84) that showed heterogeneous response. For each year value of area under disease progress curve (AUDPC) of all genotypes was also calculated which falls between 100-850. Efficacy of four plant extracts (neem, garlic, ginger and bell pepper) using seed soaking method in controlling the stripe rust disease of wheat was investigated in pots experiment. During both years, minimum disease was observed in case of garlic bulb extract followed by neem leaves extract. Ginger bulb and Bell pepper fruit extract also had significant effect against wheat stripe rust. From the current study it could be suggested that using highly resistant germplasm advance lines may be developed that exhibit the resistant genes against stripe rust pathogen and it is observed that instead if using fungicides, use of botanicals not only reduced the human health hazard but also control the disease effectively.
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- 2022
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4. DEVELOPMENT OF PREDICTION MODELS FOR STRIPE DISEASE OF BARLEY CAUSED BY DRECHSLER GRAMINEA IN RAJASTHAN
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Virendra Kumar1*, P. S. Shekhawat2, S. K. Sain3, Harshraj Kanwar 1, K. K. Saini1 And Debashis Paul4 1Ph.D. Scholar, Division Of Plant Pathology, Rajasthan Agricultural Research Institute, Durgapura (Jaipur), 302018, SKN Agriculture University, Jobner. 2Associate Professor, Division Of Plant Pathology, Rajasthan Agricultural Research Institute, Durgapura (Jaipur), 302018, SKN Agriculture University, Jobner. 3Principal Scientist (Plant Pathology), ICAR-Central Institute For Cotton Research-Regional Station, Sirsa, Haryana. 4 Scientist (Seed Technology), ICAR-Central Institute For Cotton Research-Regional Station, Sirsa, Haryana.
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Stripe disease caused by Drechslera graminea (Telomorph- Pyrenophora graminea) is one of the most important diseases of barley which causes significant grain loss. Weather factors may play an important role in its severity and crop loss which are not yet known. The field experiment was carried out during Rabi season 2016-17 and 2017-18, at the hot spot area. The pooled data of both years revealed that the per cent disease severity (DS) was higher from Dec. to Feb. but after Feb. the disease severity gradually decreased after the 4th SMW. The simple correlation analysis of pooled data revealed that the per cent disease severity showed a positive correlation with minimum temperature, rainfall, sunshine hours, maximum soil temperature (0.57, 0.06, 0.51, 0.56). Whereas, the maximum temperature and minimum soil temperature showed a significant positive correlation (0.55* and 0.75*). The coefficient of determination and adjusted (R2=0.932* and 0.884*) indicates that the fittest regression equation for prediction of disease is 52.945-18.832*max. temperature + 8.959*min. temp.+ 1.810* max. RH – 2.272* rainfall + 17.58* min. soil temp. The model of the current study is useful in developing a more effective management strategy to prevent barley stripe disease in the face of future environmental changes. Keywords: Barley, Correlation, Coefficient of determination, Pyrenophora teres, Drechslera graminea, Stripe disease.
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- 2022
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5. Occurrence and Distribution of Dry Root Rot of Mungbean incited by Macrphomina phasolina in major growing areas of Rajasthan
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Anupriya, Nitin Chawla, R.P. Ghasolia1, Shailesh Godika1 And Prahlad2 Division Of Plant Pathology, Rajasthan Agricultural Research Institute (SKNAU), Durgapura, Jaipur-302 018, Rajasthan, India 1Department Of Plant Pathology, SKN College Of Agriculture, SKNAU, Jobner, Jaipur, Rajasthan, India 2 Department Of Plant Pathology, Swami Keshwanand Rajasthan Agricultural University, Bikaner-334 006, Rajasthan, India. Corresponding Author: Anupriyapathology17@Gmail.Com
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Green gram [Vigna radiata (L.) Wilczek], also known as mungbean, is one of the important pulse crops belongs to the family Fabaceae and it is the third important pulse crop of India globally grown in over 40 countries after chickpea and pigeon pea. Dry root rot is one of the major diseases of green gram caused by Macrophomina phaseolina which causes severe yield reduction in Rajasthan and India. A roving survey was conducted to assess the incidence of dry root rot in six major mungbean growing districts (Jaipur, Nagaur, Sri Ganganagar, Bikaner, Churu and Hanumangarh) of Rajasthan during Kharif season of 2020. Our investigations cleared that this disease is prevalent in all the surveyed 108 fields in six districts of Rajasthan with 22.67 per cent overall disease incidence. Maximum disease incidence was recorded in Bikaner (28.49 %) district while it was lowest in Jaipur district (17.12 %). During survey, it was also noted that sandy loam soil had the highest average illness incidence (27.40%) followed by clay loam soil (24.37%) while it was lowest in loamy sand soil (19.92%). Irrigations methods also played an important role in enhancing incidence and it was maximum (27.30%) under rainfed conditions in comparison to flood irrigation systems (25.61%) and sprinkler conditions (21.94%). Conclusively, in can be finalized that dry root rot disease is prevalent in almost entire mungbean growing regions where sandy loam soil and dry conditions are prevalent and these factors are the most helpful in occurrence of the disease in Rajasthan that should be avoided in severely infected areas otherwise it might be severe in future.
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- 2022
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6. INTERACTION BETWEEN ALTERNARIA AND CORYNESPORA LEAF SPOT PATHOGENS IN COTTON UNDER IN VITRO CONDITIONS Duddu Mahesh1* , S L Bhattiprolu2 , V Prasanna Kumari1 , P Anil Kumar1 and Ch Chiranjeevi3 1*Department of Plant Pathology, Agricultural College, Bapatla, ANGRAU, Andhra Pradesh, India. 2Department of Plant Pathology, RARS, Lam, Guntur, ANGRAU, Andhra Pradesh, India. 3Department of Entomology, Agricultural College, Bapatla, ANGRAU, Andhra Pradesh, India. ( 1*Corresponding author: maheshduddu25@
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INTERACTION BETWEEN ALTERNARIA AND CORYNESPORA LEAF SPOT PATHOGENS IN COTTON UNDER IN VITRO CONDITIONS Duddu Mahesh1* , S L Bhattiprolu2 , V Prasanna Kumari1 , P Anil Kumar1 And Ch Chiranjeevi3 1*Department Of Plant Pathology, Agricultural College, Bapatla, ANGRAU, Andhra Pradesh, India. 2Department Of Plant Pathology, RARS, Lam, Guntur, ANGRAU, Andhra Pradesh, India. 3Department Of Entomology, Agricultural College, Bapatla, ANGRAU, Andhra Pradesh, India. ( 1*Corresponding Author: Maheshduddu25@
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Cotton (Gossypium spp.) is one of the predominant fibre and cash crop and infected by various cotton diseases. Under congenial conditions two major leaf spot pathogens, Alternaria spp. and Corynespora cassiicola cause significant reduction in cotton yield. In cotton fields it is difficult to find the differences between Alternaria spp. and C. cassiicola due to its similarity in appearance of symptoms, mode of infection and nature of damage. The present investigation was carried out to understand the interaction between A. alternata and C. cassiicola through dual culture technique with different time intervals of inoculation (24, 48 and 72 hr) along with simultaneous inoculation and their controls, irrespective of inoculation order of A. alternata and C. cassiicola. Under in vitro conditions, A. alternata was inhibited by C. cassiicola in all the treatments at 7 days after inoculation (DAI), irrespective of inoculation order of the respective pathogen and time intervals except at 24 h (C. cassiicola inoculated first followed by A. alternata) and 72 h (A. alternata inoculated first followed by C. cassiicola). At 14 days after inoculation (DAI), C. cassiicola was inhibited by A. alternata in all the treatments irrespective of time intervals of the respective pathogen and inoculation orders except at 72 h (C. cassiicola inoculated first followed by A. alternata). Between A. alternata and C. cassiicola there was absence of lysis, inhibition zone and mycoparasitism; colour change in potato dextrose agar medium was observed at interaction area; conidia, conidiphores and chlamydospores were not observed in A. alternata when interacted with C. cassiicola. KEYWORDS: Alternaria alternata, Corynespora cassiicola, Cotton, Dual Culture, Interaction, in vitro. Citation
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- 2022
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7. DYNAMIC CHANGES AND QUANTIFICATION OF DEFENSE ENZYMES ACTIVITIES ON CHEMO-FORTIFIED CHICKPEA AGAINST Fusarium oxysporum f. sp. CICRIS
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1P. Murali Sankar*, 2S. Shreedevasena, 3L. Karthiba, 4S. Vanitha, 5A. Kamalakannan, 6P. Anantha Raju, 7P. Jeyakumar 1Department Of Plant Pathology, SRSIAT, Vedasandur, Tamil Nadu, India. 2Department Of Plant Pathology, UAS, GKVK, Bengaluru, Karnataka, India. 3,4,5Department Of Plant Pathology, 7Department Of Crop Physiology, TNAU, Coimbatore, Tamil Nadu, India. 6Department Of Plant Breeding & Genetics, ADAC & RI, Tiruchirappalli, Tamil Nadu, India.
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Till now, the agricultural production and management practices were questionable ones due to the severe losses incurred by pathogens and its potential of survival, colonization and disease prevalence. In these situations, a new adopted eco-based and affordable practice “using synthetic elicitors” plays a vital role in crop protection. Keeping this in mind, the work was framed out for disease management by using synthetic elicitors and its dynamic changes and quantification of defense enzymes against Fusarium oxysporum f. sp. ciceris [MF803741] on chickpea cv. JAKI 9218 under in vitro. Six synthetic chemical elicitors, viz., benzothiadiazole, salicylic acid, potassium silicate, potassium phosphate, humic acid and carbendazim were used through chemo-fortification by three different conc., viz. 1.0, 2.0 and 3.0 mM on cv. JAKI 9218 under pot conditions. The changing dynamics of enzyme activity was recorded from 0-24 days from sowing. Among these, salicylic acid at 3.0 mM conc. fortified seeds were recorded the least wilt incidence of 17.3% with 66.0% disease reduction and exploited a wide range of five defense proteins, viz., 14, 29, 53, 67 and 83.4 kDa and enzyme-isoforms four, viz., PO1 to PO4 (peroxidase); PPO1 to PPO4 (polyphenol oxidase) and three SOD1 to SOD3 (superoxide dismutase). On dynamic changes of enzymes activities, viz. peroxidase (1.50 absorbance), polyphenol oxidase (1.42 absorbance), superoxide dismutase (7.60 Unit) and phenol content (19.24) µg of catechol / min / gram of tissue increased up to 18 days. Hence, using the least quantity of elicitors enhanced and triggered the defense profiles in the forms of antioxidants, enzymes and proteins in chickpea against to wilt pathogen. KEYWORDS: Benzothiadiazole, chickpea, fortification, JAKI 9218, peroxidase, wilt.
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- 2022
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8. Oregon flora newsletter.
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Oregon State University. Department of Botany & Plant Pathology, Oregon State University. Herbarium, and New York Botanical Garden, LuEsther T. Mertz Library
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Oregon ,Oregon Flora Project ,Periodicals ,Plants - Published
- 1995
9. Evaluation of Triticum aestivum L. germplasm against Puccinia striiformis and its management through botanicals
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Plant Pathology, Binyamin, primary
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- 2022
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10. CULTURAL, MORPHOLOGICAL AND PATHOGENIC VARIABILITY AMONG THE ISOLATES OF Fusarium oxysporum F. SP. CUMINI
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Ganesuni Lakshmi Prasanna1, Dr. N. R. Patel2, Dr. Jyotika Purohit3, Dr. Kapil K Tiwari4 1,2,3Department Of Plant Pathology, 4Department Of Biotechnology Sardarkrushinagar Dantiwada Agricultural University Sardarkrushinagar, Gujarat- 385505
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Fusarium oxysporum f. sp. cumini is a most serious disease in the cumin (Cuminum cyminum L.). The ten isolates of Fusarium oxysporum f. sp. cumini were isolated from major cumin-growing districts of North Gujarat. The studies were made on cultural variability (colony growth, growth pattern, colony color, and pigmentation), morphological variability, and pathogenic variability. The results of cultural variations showed that the colony diameter ranged from 58.50 mm (I6) to 87.50 mm (I8) and the growth pattern varied from dense cottony and profuse mycelia growth to slightly fluffy with visible hairy mycelia growth and dense with irregular margins at the periphery. The mycelial pigmentation among the ten isolates varied from white to yellowish and grey white, orange to whitish orange, and pink to pinkish white, whereas substrate pigmentation varied from pale yellow, yellowish brown, pink to dark pink, and grey black. Morphological variability studies revealed that all the isolates produced abundant scanty sporulation on PDA media. The number of septa in microconidia varied from 0 to 2. The length of microconidia ranged from 7.06 µm (I9) to 12.26 µm (I4), while the breadth of microconidia ranged from 2.98 µm (I5) to 4.16 µm (I6). The number of septa in macroconidia varied from 2 to 5. The length of macroconidia ranged from 19.56 µm (I3) to 32.28 µm (I4), while the breadth of macroconidia ranged from 3.02 µm (I5) to 4.2 µm (I6). And the results of pathogenic variability studies revealed that the disease intensity on cumin was ranged from (I3) 50.52 to (I10) 28.71 per cent. Keywords:Cuminum cyminum L., Fusarium oxysporum f. sp. cumini, pigmentation, cultural variability, sporulation, disease intensity.
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- 2022
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11. DIFFERENTIAL REACTION OF RICE CULTIVARS IN SEED GERMINATION AND SEEDLING VIGOUR IN Trichoderma harzianum TREATED SEEDS
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Lakshman Prasad, Someshree Mane, Aditi Singh, Sushma Sagar, Gyanendra Singh1 And A.K. Singh1 Division Of Plant Pathology, 1Division Of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi-110012, India Laxmanprasad25@Yahoo.Com
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Rice is one of the most important food crop drastically affected by several biotic and abiotic factors. The present study aimed to examine differential response of rice cultivars treated with Trichoderma harzianum to improve seed germination and seedling vigour. To obtain higher quality seedlings T. harzianum can be employed. Trichoderma stimulates seedlings growth through accelerating nutrient absorption and inhibiting harmful root microorganisms. The seeds of rice cultivars were treated in T. harzianum suspension @107 conidia/ml and kept overnight and then next day arranged in germination paper containing 200 seeds each. Seeds were soaked in sterilised water only serve as control. The results showed that among the treated paddy cultivars the maximum per cent increase in seed vigour index was observed in PB-1886 followed by PB-1885, PB-1718 and PB-1509. Similarly, the maximum per cent increase in shoot length and root length was recorded in PB-1886 and PB-1885, respectively. Two cultivars namely PB-1886 and PB-1885 were found highly responsive to T. harzianum. Hence, it can be concluded that T. harzianum increased rice seedling growth, germination rate, seedling biomass and vigour. Keywords: Rice, Seed germination, Seedling vigour, Seedling biomass, Trichoderma.
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- 2022
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12. IMPACTS OF ENHANCED CARBON DIOXIDE CONCENTRATION IN THE VEGETABLE NUTRITIONAL QUALITY: A REVIEW
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Samiksha1, Shweta Verma2, Vivek Kumar Patel*3and Saipayan Ghosh4 1Department Of Horticulture, Sam Higgins Bottom University Of Agriculture, Technology And Sciences. Naini, Prayagraj.(U.P) India. 2Department Of Horticulture, BBAU, Lucknow (U.P) India 3Department Of Plant Pathology, 4Department Of Horticulture, RPCAU, Pusa, Samastipur, Bihar, 848125 Vivek10995@Gmail.Com
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Vegetable productivity is increased and their nutritional value may be impacted by elevated atmospheric CO2 (eCO2). We performed a meta-analysis using 57 articles and 1,015 observations and discovered that eCO2 increased the concentrations of fructose, glucose, total soluble sugar, total antioxidant capacity, total phenols, total flavonoids, ascorbic acid, and calcium in the edible part of vegetables by 14.2%, 13.2%, 17.5%, 59.0%, 8.9%, 45.5%, and 8.2%, respectively. However, eCO2 decreased the concentrations of protein, nitrate, The levels of titratable acidity, total chlorophyll, carotenoids, lycopene, anthocyanins, phosphorus, potassium, sulphur, copper, and manganese were unaffected by eCO2. On the basis of the interactions between eCO2 and numerous parameters, including as species, cultivars, CO2 levels, growth stages, light, O3 stress, nutrients, and salinity, we also suggest a number of methods for enhancing vegetable quality. Finally, we provide an overview of how eCO2 has affected the quality of three commonly grown crops: lettuce, tomatoes, and potato. Keywords: antioxidants, climate change, elevated carbon dioxide, environmental factors, greenhouse vegetables, mineral, protein, soluble sugar. Citation Samiksha1, Shweta Verma2, Vivek Kumar Patel*3and Saipayan Ghosh4. Impacts of enhanced carbon dioxide concentration in the vegetable nutritional quality: A review. Scientist. 2022;1(3): 5000-5009. DOI: Competing Interest: The authors have declared that no competing interest exists. Data Availability: All relevant data are within the paper and its supporting information files.
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- 2022
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13. CLUSTER FRONT LINE DEMONSTRATIONS IN CHICKPEA FOR HIGHER PRODUCTIVITY AND PROFITABILITY IN ANANTAPURAMU DISTRICT OF ANDHRA PRADESH
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Siva Jyothi V*1 And Lahari K2 Subject Matter Specialist (Crop Production)1 And Scientist (Plant Pathology)2 Krishi Vigyan Kendra, ANGRAU, Anantapuramu, Acharya N. G. Ranga Agricultural University, Andhra Pradesh V.Sivajyothi@Angrau.Ac.In
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Chickpea is the second most widely cultivating crop in Anantapuram during Rabi season. Krishi Vigyan Kendra (KVK) has conducted cluster front line demonstrations and front-line demonstrations in chickpea from 2018-19 to 2019-20 and 2020-21 respectively, in a total of 85 ha to evaluate the performance of improved, high yielding, chickpea variety i. e NBeG-49 along with integrated crop management practices in adopted villages of Ananthapuramu district. In all of the study periods, the results revealed that the shown variety produced the highest yield when compared to farmer's practice. During 2018-19 to 2020-21, yield increased by 15.5, 31.0, and 16.7%, respectively. From 2018-19 to 2020-21, the proven yields were 1224 kg/ha, 950 kg/ha, and 1575 kg/ha, respectively, compared to farmer practice of 1060 kg/ha, 725 kg/ha, and 1350 kg/ha. The technology gap, extension gap was recorded 576 kg/ha, 850 kg/ha and 225 kg/ha, 164 kg/ha, 225 kg/ha and 225 kg/ha during 2018-19, 2019-20 and 2020-21 respectively. Between 2018-19 to 2020-21, the technology index fluctuated between 12.5 and 47.2. Chickpea output can be increased by encouraging farmers to select high-yielding varieties, tolerance to wilt and moisture stress, improved technology, and timely delivery of need-based inputs. KEYWORDS: CFLD, Chickpea, Growth, Yield, Economics, Gap
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- 2022
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14. RELEASE KINETICS AND SOLUBILIZATION OF INSOLUBLE ZINC COMPOUNDS IN RESPONSE TO ZINC SOLUBILIZING BACTERIAL (ZSB) ISOLATES
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Ankesh Kumar Chanchal1, Mahendra Singh1*, Amit Kumar Pradhan1, Debjit Chakraborty1, Nilanjan Chattopadhyaya1, Santosh Kumar2 And Shashank Tyagi3 1Department Of Soil Science And Agricultural Chemistry, Bihar Agricultural University, Sabour, Bhagalpur-813210, India 2Department Of Plant Pathology, 3Department Of Agronomy, Bihar Agricultural University, Sabour, Bhagalpur-813210, India M.Singh30648@Gmail.Com
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Zinc (Zn) is an essential micronutrient that is required for optimum plant growth. It is present in soil in insoluble forms. Bacterial solubilization of soil unavailable form of Zn into available form is an emerging approach to alleviate the Zn deficiency for plants and human beings. Zinc solubilizing bacteria (ZSB) could be a substitute for chemical Zn fertilizer. Zn solubilizing ability of 16S rRNA identified Bacillus sp., Peribacillus sp. Enterobacter sp. and Pseudomonas sp. was assessed using zinc oxide, zinc phosphate and zinc carbonate in both plate and broth assays. The ZSB_A3 (Priestia megaterium strain BAU_A3) obtained from the zinc deficient rhizospheric soil exhibited the highest potential in Zinc oxide (ZnO) containing medium, produced maximum hallow zone (2.33 cm) with a solubilization index (1.57) and DTPA Zn in broth culture was 58.49 mg kg-1 of zinc in zinc oxide, 51.60 mg kg-1 in the Zn3 (PO4)2 respectively.Thus, the solubilization potential varies among different cultures. The solubilization might be due to production of acids by the culture, since the pH of the culture broth has been shifted form 7.0-7.3 to 4.8-6.5 after 15 days of inoculation. The kinetics release modeling of Zn2+ through the insoluble zinc compounds has a high correlation coefficient R2 values with 0.950, 0.933 and 0.920, from ZnO, Zn3(PO4)2 and ZnCO3 respectively, leading thus to a perfect linearity. Insoluble zinc compounds, where these results indicate clearly that the kinetics of Zn2+ ion release through the used compounds is described with a satisfactory way by Zero order reaction
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- 2022
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15. Nanotechnology: A Novel Approach for Plant Disease Management
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Tabasum Manzoor1, Tariq Rasool Rather1, Heena Altaf1, *Fazil Fayaz Wani1, *Liyaqat Ayoub2 And Saima Bashir2 1Division Of Plant Pathology, SKUAST-Kashmir 2Division Of Entomology, SKUAST-Kashmir
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In order to produce some fresh materials with fascinating qualities, translating traditional scientific notions into a new durable creation is a greatly required one at the moment. Nanoscale particles outperform their bulk counterparts in terms of activity. This one-of-a-kind property is widely used in the physical, chemical, and biological fields. Nanotechnology's application in agriculture has fundamentally transformed current agricultural techniques. Development of disease resistance and higher output without collecting environmental toxins is one of the growing issues in the present agricultural system. The majority of commonly used chemical fertilizers and pesticides have a number of negative consequences on both plants and the environment. Nanotechnology may provide green and environmentally friendly plant disease treatment options. Green nanoparticle manufacturing utilizing plant extracts and microorganisms has gotten a lot of interest since it's easy to do, biodegradable, and effective against a variety of plant pathogenic microorganisms. Nanotechnology has the potential to improve pesticides by decreasing toxicity, expanding shelf life, and enhancing the solubility of pesticides that are poorly water soluble, all of which might have a beneficial environmental impact. Nanoparticles can be used to manage plant disease in two ways: as stand alone protectants or as nanocarriers for insecticides, fungicides, herbicides, and RNA-interference agents. Key Words: Nanotechnology, Current research
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- 2022
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16. Combined application of organic manures and bio-fertilizers can improve growth, yield and quality of spinach beet (Beta vulgaris var. bengalensis) in calcareous soils
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Udit Kumar1, S.S. Prasad2, Saipayan Ghosh1, K. Prasad3, Pramila1, Vivek Kumar Patel4, Prithwiraj Dey5, Biswajit Pramanick6* And B. Sri Sai Siddartha Naik7 1Department Of Horticulture,4Department Of Plant Pathology, 5Krishi Vigyan Kendra, Gopalganj And6Department Of Agronomy, Dr. Rajendra Prasad Central Agricultural University, Pusa–848125, Bihar, India 2Department Of Soil Scienceand3Department Of Horticulture, Tirhut College Of Agriculture, Dr. Rajendra Prasad Central Agricultural University, Pusa–848125, Bihar, India 7Teaching Associate, Agronomy At Agricultural College, Bapatla, ANGRAU.
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Sole application of organic manure to fulfil the crop nutrition sometimes looks beyond practical as the availability of the organic manure is a concern. Combined application of manures and biofertilizers can alleviate this problem reducing the application-rate of manures. Present study was conducted for three years (2017–2020) to evaluate the effect of organic manures and biofertilizers on growth, yield and quality of spinach beet leaf grown in calcareous soils. The experiment was laid down in Randomized Block Design with seven treatments and three replications. The treatments were comprised of three organic manures applied solely and in combination with biofertilizers apart from one control with recommended dose of nutrition through chemical fertilizers. The profitability of treatments was presented in terms of benefit-cost ratio. From this study, the maximum plant height (29.43 cm), leaf area (30.56 cm2), number of leaves per plant (24.38), fresh weight of leaves per plant (92.49g) and leaves yield per hectare (226.97q) were recorded with application of vermicompost at 3 Mg ha-1 + Azospirillum at 5kgha-1 +PSB at 5kgha-1. This treatment also recorded for the highest profitability in terms of gross return and net income with a benefit-cost ratio of 2.18. This treatment also improved the tissue phosphorus, iron, calcium, carotenoids contents in spinach beet leaves. From this three-year’s long study, it was concluded that combined application of vermicompost + Azospirillum + PSB can improve the yield and quality of spinach beet in calcareous soils. KEYWORDS: Azospirillium, FYM, PSB, Spinach beet, Vermicompost
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- 2022
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17. BIO-EFFICACY OF FUNGICIDES, BOTANICALS AND BIO-AGENTS FOR THE MANAGEMENT OF LENTIL WILT, INCITANT BY Fusarium oxysporum F. SP. LENTIS Sudipta Mahato1, Subhash Chandra1, Ramesh Chand*1, Shyam Babu Gautam1, S. C. Vimal2 1Department of Plant Pathology, 2Department of Genetics and Plant Breeding 1,2Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya, U.P. (224229), India
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BIO-EFFICACY OF FUNGICIDES, BOTANICALS AND BIO-AGENTS FOR THE MANAGEMENT OF LENTIL WILT, INCITANT BY Fusarium Oxysporum F. SP. LENTIS Sudipta Mahato1, Subhash Chandra1, Ramesh Chand*1, Shyam Babu Gautam1, S. C. Vimal2 1Department Of Plant Pathology, 2Department Of Genetics And Plant Breeding 1,2Acharya Narendra Deva University Of Agriculture And Technology, Kumarganj, Ayodhya, U.P. (224229), India.
- Abstract
Studies on the “Management of Fusarium oxysporum f. sp. lentis wilt in lentil using fungicide, botanical and bio-agents” was carried out using nine treatments as Trichoderma viride @ 4 gms/kg seed, Bacillus subtilis @ 10 gms/kg seed, Pseudomonas fluorescens @ 4 gm/kg seed, Onion Bulb extract @ 10 %, Garlic Bulb extract @ 10 %, Neem Leaf extract @ 10 %, Propiconazole @ 0.2 % and Azoxystrobin @ 0.2 % with untreated check. The observations at 30 days,45 days and 60 days old crop was recorded on per cent disease incidence and percent disease control. The observations showed that the lowest incidence was recorded in Propiconazole-treated plots but the disease incidence was observed at par with Azoxystrobin treatment and the highest incidence was recorded in untreated check. At 60 days old crop lowest disease incidence was observed in Propiconazole (15.27 %), followed by Azoxystrobin (18.29 %), T. viride (32.16 %), Pseudomonas fluorescens (39.89 %) and Bacillus subtilis (43.07 %). Among the botanicals lowest disease incidence was observed in garlic bulb extract (49.63 %). The highest disease control was observed in Propiconazole (79.22 %) at 60 days old crop. In case of bio-agents and botanicals, the best performance was shown by Trichoderma viride (56.38 %) and garlic extract (32.60 %) respectively, in per cent disease control. Keywords: Bio-agent, Botanicals, fungicides, Fusarium oxysporum f. sp. lentis, in vivo, Lentil, Disease, Management, Wilt.
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- 2022
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18. BIOCHEMICAL CHANGES IN OPIUM POPPY LEAVES INFECTED WITH DOWNY MILDEW DISEASE INCITED BY Peronospora arborescens
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Shivam Singh1*, RS Mishra2, Jaish Raj Yadav3 And Manish Kumar Maurya4 1*, 3Research Scholar, 2Assistant Professor, Department Of Plant Pathology, Acharya Narendra Deva University Of Agriculture And Technology, Kumarganj, Ayodhya, Uttar Pradesh, 224229 4Subject Matter Specialist (Plant Protection), Krishi Vigyan Kendra, Mankapur, Gonda II (UP) 271302
- Abstract
Studies on biochemical changes in opium poppy leaves incited by Peronospora arborescens causing downy mildew, a widespread and destructive disease, were undertaken at ANDUA&T Kumarganj, Ayodhya, and Uttar Pradesh. Leaves showing several different symptoms were collected randomly at pre flowering, flowering and maturity stage of crop. Higher amount of total phenol content at pre flowering stage was observed in infected leaves (1-25%) which was 25.0 (mg) GAE/100 gm dry weights higher than the healthy plant. At flowering stage maximum amount of total phenol content observed in infected leaves than the healthy plant leaves which gave 17.25 (mg) GAE/100 gm dry weights. The higher amount of total phenol content was observed at the time of maturity in healthy leaves than the infected leaves which was 12.75 (mg) GAE/100 gm dry weights. Maximum protein content was observed in healthy leaves than the infected leaves. However, the significant difference was also observed in the amount of total protein content present in infected leaves having necrotic lesion at all three stages of crop. The content of a, b and total chlorophyll decreased with the disease development in the infected leaves when compared to healthy. The chlorophyll decrease was higher in more than 50% infected leaves at all three-stage mention in table as compared to healthy one.
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- 2022
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19. Genetic Variability, Heritability and Genetic advance studies in Table Pea (Pisum sativum var. Hortense L.)
- Author
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Budhesh Pratap Singh1*, K.P. Singh1, Jitendra Kumar1, Lalit Yadav1, Rakesh Kumar1, Akash Singh2 1Department Of Vegetable Science, Chandra Shekhar Azad University Of Agriculture And Technology, Kanpur, Uttar Pradesh 2Department Of Plant Pathology, Chandra Shekhar Azad University Of Agriculture And Technology, Kanpur, Uttar Pradesh
- Abstract
The field experiment was conducted under irrigated condition during Rabi 2018-19 at Department of Vegetable, Kalyanpur of C. S. Azad University of Agriculture and Technology, Kanpur. Forty genotypes/varieties of table pea (Pisum sativum var. Hortense L) were evaluated in an experiment in the randomized block design (RBD) with 3 replications and 8 treatments. The observations were recorded on five randomly selected plants of each genotype and the average was worked out in each replication for the traits viz., Days to 50% flowering, Plant height (cm), Number of branches per plan, Number of pods per plant, Pod length (cm), Pod width (cm), Number of seeds per pod, Green Pod yield per plant (g). All the characters studied showed considerable amount of variability, green pod yield per plant had highest coefficient of genotypic and phenotypic variability. Phenotypic coefficients of variability were higher than their respective genotypic coefficient of variability for all the characters studied. Almost all the characters studied showed higher heritability. The highest estimate of genetic advance (in per cent of mean) emerged for green pod yield per plant. The estimate of genetic advance in per cent mean was comparatively low for no. of branches per plant.
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- 2022
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20. STUDIES ON ALTERNATE HOST OF TOMATO LEAF CURL VIRUS (ToLCV) AND ITS ROLE IN EPIDEMIOLOGY OF DISEASE
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Someshree Mane*, T K Narute And PravinKhaire Department Of Plant Pathology And Agril. Microbiology, Post Graduate Institute, MPKV, Rahuri, (MH) -413722
- Abstract
Tomatoes are a significant fruit vegetable growing in Maharashtra's western area. The crop suffers significant losses as a result of infection with a whitefly-borne tomato leaf curl virus. The current study looks on the role of alternate hosts in viral transmission in tomato-growing areas. Since, ToLCV has a very broad host range and the vector whitefly on a wide range of hosts, several host plants harbouring both virus and vector were identified. They were perennials, including plants produced for food, fodder, and vegetables, and were a constant source of ToLCV inoculum in nature, with a possible role in the effect of climatic circumstances and cultural practises on the amount of infection. Keywords: Host range, Tomato, Weeds, ToLCV, Epidemiology
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- 2022
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21. UPSURGING THE MEDIA FOR OPTIMAL GROWTH AND SPORULATION OF SPHAERELLOPSIS PARAPHYSATA Johnson, I*., Asmitha Sri, P., Karthikeyan, M. Ramjegathesh, R. And Raguchander, T. Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore – 641003, Tamil Nadu, INDIA
- Author
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UPSURGING THE MEDIA FOR OPTIMAL GROWTH AND SPORULATION OF SPHAERELLOPSIS PARAPHYSATA Johnson, I*., Asmitha Sri, P., Karthikeyan, M. Ramjegathesh, R. And Raguchander, T. Department Of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore – 641003, Tamil Nadu, INDIA
- Abstract
Several biotic and abiotic factors distress the pearl millet and significantly influence the production. Leaf rust, caused by Puccinia substriata , is the most important disease among the biotic factors, which reduced the yield up to 76 percent. Sphaerellopsis paraphysata is a rust mycoparasite with a wide host range that inhibits rust spore germination which could be cultured and could be grown on potato dextrose agar media. The effect of different carbon and nitrogen sources on the growth of S. paraphysata TNAU Sp1 showed that the dextrose and sodium nitrate supported the maximum mean mycelial growth and recorded 60.00 and 58.67 mm, respectively. Similarly, maximum mycelial growth and pycnidial production of S. paraphysata were observed at 20ºC (38.3 mm) temperature and 6.5 pH (55.0 mm).
- Published
- 2022
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22. SCREENING OF RICE GENOTYPES FOR BACTERIAL BLIGHT OF RICE UNDER ARTIFICIAL INOCULATION METHOD
- Author
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Bhukya Srinivas1*, Katravath Srinivas2 And Dr. V. A. Patil3 Department Of Plant Pathology, NMCA, NAU, Navsari, Gujarat- 396 450, India Bhukyasrinivas954@Gmail.Com
- Abstract
Bacterial blight of rice is a common vascular disease that is systemic in nature. It infects seedlings after transplantation and subsequently during the booting stage in the nursery. Plant disease control requires the use of agrochemicals. In order to do this, researchers investigated the screening of thirty genotypes along with two susceptible checks against bacterial blight pathogen under artificial inoculation condition during kharif 2020 revealed that, 3 genotypes were found moderately resistant viz., NVSR-466, NVSR-396 and ISM. Whereas, 12 genotypes viz., NVSR-411, NVSR-443, NVSR-447, NVSR-453, GNR-6, IR-28, NAUR-1, GNR-2, Gurjari, GNR-4, Krishna kamod and GAR-13 were found susceptible to Xoo and two checks viz., GR-11 and TN-1 were found highly susceptible. Given the severity of the rice BB disease in South Gujarat, the goal of this study was to determine the best effective management strategy for bacterial blight disease in rice crops by employing screening of rice genotypes for bacterial blight of rice under artificial inoculation method.
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- 2022
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23. STATUS OF PHYTOPLASMA DISEASE ASSOCIATED WITH EGGPLANT IN TAMIL NADU
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Priya Y. Gawande1*, Dr. M. Karthikeyan2, Dr. I. Johnson3, Dr. R. Swarnapriya4, Dr. N. Manikanda Boopathi5 1,2,3Department Of Plant Pathology, TNAU, Coimbatore (Tamilnadu), India. 4Floriculture Research Station, Thovalai, (Tamilnadu), India. 5Department Of Plant Biotechnology, TNAU, Coimbatore, (Tamilnadu), India.
- Subjects
Phytoplasma, Brinjal, Little leaf, Molecular characterization, Candidatus Phytoplasma trifolii - Abstract
Phytoplasma is one of the devastating pathogens responsible for significant crop losses in eggplant globally that causes little leaf of brinjal. This study focuses on survey, disease incidence and molecular characterization of BLL (Brinjal little leaf) phytoplasma. In 2021-2022, surveys were carried out in six regions of Tamil Nadu where brinjal is grown, and 6 BLL samples were collected for phytoplasma identification. Disease incidence is calculated on the basis of symptoms exhibited by phytoplasma infected plant in three different seasons. Collected samples exhibited little leaf, phyllody, and witches' broom symptoms. Coimbatore region showed highest disease incidence (22.01%) and Thenkasi with lowest (17.58%). Phytoplasma-specific primer pairs P1/P6 (amplify 16S rRNA region) R16F2n/R16R2 ( amplify internal region of the 16S rRNA region) were used in the nested PCR to detect and characterize the of phytoplasmas present in each of the six BLL samples. Sequence analysis discovered that the Candidatus Phytoplasma trifolii was associated with BLL with 98.54% percent and identity, with other isolates.
- Published
- 2022
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24. PRODUCTION POTENTIAL OF VEGETABLE PEA (Pisum sativum L.) AS INFLUENCED BY SULPHUR AND BORON LEVELS IN CALCAREOUS SOIL OF NORTH BIHAR
- Author
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Udit Kumar*, Chhail Bihari, Pramila, K. Prasad1, Saipayan Ghosh, B. M. Sinha, Vivek Kumar Patel2 Department Of Horticulture, PG College Of Agriculture, RPCAU, Pusa 1Department Of Horticulture, Tirhut College Of Agriculture, Dholi, RPCAU, Pusa 2Department Of Plant Pathology, PG College Of Agriculture, RPCAU, Pusa Udithort@Gmail.Com
- Abstract
Vegetable pea is one of the relevant vegetable crops grown in the cool season all over the India. Sulphur deficiency is becoming more prevalent in Bihar due to the less use of boron and sulphur-containing fertilizer in calcareous soils and the consequent decrease in sulphur and boron nutrients. On the other hand, organic matter-rich manures are utilized in very small quantities and are a source of a variety of macro-and micronutrients, including sulphur and boron. As a consequence, soils have become deficient in sulphur and boron, which is detrimental to crop production. In the absence of these sulphur and boron in the soil, different legume crops such as vegetable pea suffer from reduced growth, yield, and nodule formation.”In this field investigation during 2020-2022, experiments were conducted in FRBD using fifteen different combinations of Boron and Sulphur doses in Azad Pea-3 variety of vegetable pea in three replications and different pod and seed yield attributing traits were studied. Among the different treatments, it has been inferred that treatment combination S4 B2 (40 kg S ha-1+ 2 kg B ha-1)”exhibited superiority over rest of the treatment combinations with respect to pod and seed yield attributes of vegetable pea.
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- 2022
- Full Text
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25. List of Plant Diseases in Korea Newly Reported in 2012
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The Committee of Plant Disease Name Consultation in the Korean Society of Plant Pathology
- Subjects
Korea ,List ,Agriculture (General) ,S1-972 - Abstract
List of plant diseases in Korea newly reported in 2012 was prepared by the Committee of Plant Disease Name Consultation in the Korean Society of Plant Pathology. One virus disease, eight bacterial diseases and 54 fungal and fungal-like organism diseases newly found from 56 species of plants, and one fungal mushroom disease were included in the list. One fungal plant disease and one fungal mushroom disease omitted in the previous list up to 2011 were newly added to the list of plant diseases in Korea.
- Published
- 2013
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- View/download PDF
26. Evaluation of Bioagents for their Compatibility in the Development of Consortium for Enhanced Efficacy
- Author
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G.B.Pant University of Agriculture and Technology, Amirthalingam, V.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Tewari, A. K.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Sharma, Manju; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Sharma, Roopali; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Kumar, J.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, G.B.Pant University of Agriculture and Technology, Amirthalingam, V.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Tewari, A. K.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Sharma, Manju; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, Sharma, Roopali; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, and Kumar, J.; Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand
- Abstract
The concept of development of microbial consortia for bio-control relies on the fact that bioagents under natural habitats live in communities with some benefits for plants. Application of bioagents in a consortium may improve efficacy, reliability and consistency of the bioagents even under diverse soil and environmental conditions. Diversity in biocontrol mechanisms offered by each bioagent in consortium may help in enhancing disease suppressiveness and may also strengthen the capabilities of the partners in an additive or synergistic manner. Till now no guideline has been published for the evaluation of bioagents to test their compatibility before developing bioagent consortium. In the present studies compatibility among biocontrol potential Trichoderma-Pseudomonas and Trichoderma-Trichoderma isolates was studied by dual culture, mixed formulations and using cell free cultures. In dual culture all the combinations (14 no.) were found compatible with each other as no isolate inhibited the growth of one-another i.e. absence of  inhibition zone. All the mixed formulations of potential Trichoderma-Pseudomonas isolates (8 no.) were found compatible with each other as they were growing simultaneously on PDA without antagonizing the growth of other or formation of inhibition zone in their combinations. The cell free cultures of each Trichoderma and Pseudomonas isolates tested with each other using Food Poison Technique showed synergistic effects on their fresh mycelial weight among some combinations while majority showed no significant differences with their checks. Further all the combinations (14 no.) were tested for their effects on seed germination and vigour index of chickpea in glasshouse. All the combinations showed significantly better seed germination while some combinations viz. Th14+Psf173, TCMS36+Psf173,Th17+Th19,Th17+Psf2,Th17+TCMS36 and Th14+Psf2 showed better plant vigour index (43.5 to 44.9% ) as compared to their checks (28.8 to 41.5%).These guidelines
- Published
- 2020
27. Evaluation of Metarhizium (Nomuraea) rileyi (Farlow) Samson isolates against Spodoptera litura F. under in vitro conditions
- Author
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Saheb, Y. Peeru; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Manjula, K.; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Devaki, K.; Department of Entomology, IFT, RARS, Tirupati, Andhra Pradesh, Jaya Lakshmi, R. Sarada; Department of Plant Pathology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Reddy, B. Ravindra; Department of Statistics and Computer Applications, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Venkateswarlu, N. C.; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Saheb, Y. Peeru; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Manjula, K.; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Devaki, K.; Department of Entomology, IFT, RARS, Tirupati, Andhra Pradesh, Jaya Lakshmi, R. Sarada; Department of Plant Pathology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, Reddy, B. Ravindra; Department of Statistics and Computer Applications, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, and Venkateswarlu, N. C.; Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh
- Abstract
Fifteen isolates of Metarhizium (Nomuraea) rileyi collected from field populations of Spodoptera litura (F.) and Spodoptera frugiperda J. E. Smith in different crops across different agroclimatic zones of Andhra Pradesh were evaluated for their pathogenicity against third instar larvae of S. litura at the Biocontrol Laboratory, Regional Agricultural Research Station, Tirupati, India. Virulence was tested by applying conidial suspension @ 1x107 spores ml–1 on the groundnut leaves on which the larvae were allowed to feed. The cumulative mean larval mortality to the extent of 75.00 to 85.00% was observed with isolates viz. Nr.Yj.KZ, Nr.Dp.KZ, Nr.Rt.KZ, Nr.Rd.HATZ, Nr.Pp. HATZ and Nr.Cp.HATZ whereas the isolates Nr.Ik.SRZ, Nr.Vg.SRZ, Nr.Pl.SZ, Nr.Ag.SZ, Nr.Np.SRZ, Nr.Rp.SZ, Nr.Rg.NCZ, Nr.Hv.SRZ and Nr.Cd.SZ recorded 65.00 to 73.33% mortality.
- Published
- 2021
28. Bothalia
- Author
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Botanical Research Institute (South Africa), Botanical Survey of South Africa, National Herbarium (South Africa), South Africa. Department of Agriculture. Division of Botany and Plant Pathology, South Africa. Department of Agriculture and Forestry. Division of Plant Industry, South Africa. Department of Agriculture and Forestry. Division of Botany and Plant Pathology, South Africa. Dept. of Agriculture, South Africa. Department of Agriculture. Division of Botany, South Africa. Department of Agricultural Technical Services. Division of Botany, National Botanical Institute (South Africa), South African National Biodiversity Institute, Aosis Publishing, South African National Biodiversity Institute, and Smithsonian Libraries and Archives
- Subjects
African Journals ,Botany ,Periodicals ,Plantkunde - Published
- 1921
29. Stem rust of cereals.
- Author
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Canada. Botany and Plant Pathology Division, Craigie, J. H., Agriculture and Agri-Food Canada (archive.org), Canada. Botany and Plant Pathology Division, and Craigie, J. H.
- Subjects
Grain ,Rust fungi - Published
- 1957
30. Checklist of plants of the Ottawa District.
- Author
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Canada. Botany and Plant Pathology Division, Gillett, John M., Smithsonian Libraries, Canada. Botany and Plant Pathology Division, and Gillett, John M.
- Subjects
Botany ,Ontario ,Québec (Province) - Published
- 1958
31. Chapter 6.5 - Controversial issues: Brazil case studies
- Author
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Dusi, Andre Nepomuceno, Fontana Capalbo, Deise Maria, and de Faria, Josias Correa
- Published
- 2020
- Full Text
- View/download PDF
32. Bothalia
- Author
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Botanical Research Institute (South Africa), Botanical Survey of South Africa, National Herbarium (South Africa), South Africa. Department of Agriculture. Division of Botany and Plant Pathology, South Africa. Department of Agriculture and Forestry. Division of Plant Industry, South Africa. Department of Agriculture and Forestry. Division of Botany and Plant Pathology, South Africa. Dept. of Agriculture, South Africa. Department of Agriculture. Division of Botany, South Africa. Department of Agricultural Technical Services. Division of Botany, National Botanical Institute (South Africa), South African National Biodiversity Institute, Aosis Publishing, and South African National Biodiversity Institute
- Subjects
African Journals ,Botany ,Periodicals ,Plantkunde
33. Bothalia
- Author
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Botanical Research Institute (South Africa), Botanical Survey of South Africa, National Herbarium (South Africa), South Africa. Department of Agriculture. Division of Botany and Plant Pathology, South Africa. Department of Agriculture and Forestry. Division of Plant Industry, South Africa. Dept. of Agricultural Technical Services. Division of Botany, South Africa. Department of Agriculture and Forestry. Division of Botany and Plant Pathology, South Africa. Dept. of Agriculture, South Africa. Department of Agriculture. Division of Botany, South Africa. Department of Agricultural Technical Services. Division of Botany, South Africa. Dept. of Agriculture. Division of Botany, South Africa. Dept. of Agriculture. Division of Botany and Plant Pathology, National Botanical Institute (South Africa), South African National Biodiversity Institute, Aosis Publishing, and South African National Biodiversity Institute
- Subjects
African Journals ,Botany ,Periodicals ,Plantkunde
34. Bothalia
- Author
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Botanical Research Institute (South Africa), Botanical Survey of South Africa, National Herbarium (South Africa), South Africa. Department of Agriculture. Division of Botany and Plant Pathology, South Africa. Department of Agriculture and Forestry. Division of Plant Industry, South Africa. Dept. of Agricultural Technical Services. Division of Botany, South Africa. Department of Agriculture and Forestry. Division of Botany and Plant Pathology, South Africa. Dept. of Agriculture, South Africa. Department of Agriculture. Division of Botany, South Africa. Department of Agricultural Technical Services. Division of Botany, South Africa. Dept. of Agriculture. Division of Botany, South Africa. Dept. of Agriculture. Division of Botany and Plant Pathology, National Botanical Institute (South Africa), South African National Biodiversity Institute, Aosis Publishing, and South African National Biodiversity Institute
- Subjects
African Journals ,Botany ,Periodicals ,Plantkunde
35. Bothalia
- Author
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Botanical Research Institute (South Africa), Botanical Survey of South Africa, National Herbarium (South Africa), South Africa. Department of Agriculture. Division of Botany and Plant Pathology, South Africa. Department of Agriculture and Forestry. Division of Plant Industry, South Africa. Department of Agriculture and Forestry. Division of Botany and Plant Pathology, South Africa. Dept. of Agriculture, South Africa. Department of Agriculture. Division of Botany, South Africa. Department of Agricultural Technical Services. Division of Botany, National Botanical Institute (South Africa), South African National Biodiversity Institute, Aosis Publishing, and Smithsonian Libraries and Archives
- Subjects
African Journals ,Botany ,Periodicals ,Plantkunde
36. Checklist of plants of the Ottawa District
- Author
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Canada. Botany and Plant Pathology Division, Gillett, John M. (John Montague), 1918-2014, Smithsonian Libraries and Archives, Canada. Botany and Plant Pathology Division, and Gillett, John M. (John Montague), 1918-2014
- Subjects
Botany ,Ontario ,Québec (Province)
37. Occurrence of fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), in Chittoor district of Andhra Pradesh, India with a note on rove beetle as its potential natural enemy
- Author
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V., Abdul Rasheed; Department of Entomology, S.V. Agricultural College, Tirupati - 517 502, Andhra Pradesh, S. R., Koteswara Rao; Administrative Office, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur - 522 034, A. P., K., Sreedevi; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, B., Bhaskar; Department of Plant Pathology, S.V. Agricultural College, Tirupati, A. P., T. R., Ashika; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, T., Venkatesan; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, S. K., Jalali; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, V., Abdul Rasheed; Department of Entomology, S.V. Agricultural College, Tirupati - 517 502, Andhra Pradesh, S. R., Koteswara Rao; Administrative Office, Acharya N. G. Ranga Agricultural University (ANGRAU), Lam, Guntur - 522 034, A. P., K., Sreedevi; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, B., Bhaskar; Department of Plant Pathology, S.V. Agricultural College, Tirupati, A. P., T. R., Ashika; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, T., Venkatesan; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka, and S. K., Jalali; ICAR-National Bureau of Agricultural Insect Resources (ICAR-NBAIR), H. A. Farm Post, Hebbal, Bellary Road, Bengaluru – 560 024, Karnataka
- Abstract
The occurrence of fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in maize fields of Tirupati region, Andhra Pradesh is herewith reported. Field surveys in maize fields revealed that the rove beetle, Paederus fuscipes Curtis (Coleoptera: Staphylinidae) was found predating the larvae of fall armyworm and this is the first report of P. fuscipes on fall armyworm from India. The species identity of both fall armyworm and the rove beetle was confirmed through molecular studies by amplifying cytochrome oxidase I gene (CO1) and DNA barcoding.
- Published
- 2020
38. Biological watermelon (Citrullus lanatus L.) seed treatments for control of Acidovorax citrulli
- Author
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Plant Pathology, Physiology, and Weed Science, Welbaum, Gregory E., Baudoin, Antonius B., Westwood, James H., Klein, Rachel, Plant Pathology, Physiology, and Weed Science, Welbaum, Gregory E., Baudoin, Antonius B., Westwood, James H., and Klein, Rachel
- Abstract
Acidovorax citrulli is a seedborne pathogen responsible for bacterial fruit blotch (BFB), an economically important disease in melon and watermelon throughout the world. BFB is highly virulent and in affected fields can cause yield reduction of up to 95%, which has resulted in over $100,000 in losses to melon growers in some cases. The efficacy of green tea as an antimicrobial seed treatment against A. citrulli was tested. Watermelon seeds were treated with green tea after inoculation with transgenic A. citrulli expressing green fluorescent protein (GFP). Forty five percent of watermelon seedlings inoculated with a high level (OD600:1.0, ~8 x 108 cells/ml) of A. citrulli displayed GFP in their cotyledons. When these seeds were treated with green tea, only 11.2% displayed GFP in their cotyledons. None of the treated watermelon seedlings inoculated with a low level (OD600:0.001, ~8 x 105 cells/ml) of A. citrulli displayed GFP in their cotyledons. Green tea treatments effectively controlled the disease when administered as a liquid to infected watermelon seeds. Green tea has potential as an effective commercial treatment for pericarp infected seeds that could also be used by growers participating in the National Organic Program.
- Published
- 2020
39. Assessment of the antibacterial activity of four essential oils and the biobactericide Neco.
- Author
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University of Sciences and Technique of Masuku (Gabon), Yala, Jean-Fabrice; Laboratory of Molecular and Cellular Biology, Microbiology and Immunology team; University of Sciences and Techniques of Masuku (USTM), Mabika, Rolande Mabika; Laboratory of Molecular and Cellular Biology, Microbiology and Immunology team; University of Sciences and Techniques of Masuku (USTM), Camara, Brahima; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, Tuo, Seydou; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, Souza, Alain; Laboratory of Molecular and Cellular Biology, Microbiology-Immunology team; University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon, Lepengue, Alexis Nicaise; Laboratory of Plant Physiology, Plant Pathology and Plant Breeding, Agrobiology Research Unit, University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon, Koné, Daouda; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, M’batchi, Bertrand; Laboratory of Plant Physiology, Plant Pathology and Plant Breeding, Agrobiology Research Unit, University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon, University of Sciences and Technique of Masuku (Gabon), Yala, Jean-Fabrice; Laboratory of Molecular and Cellular Biology, Microbiology and Immunology team; University of Sciences and Techniques of Masuku (USTM), Mabika, Rolande Mabika; Laboratory of Molecular and Cellular Biology, Microbiology and Immunology team; University of Sciences and Techniques of Masuku (USTM), Camara, Brahima; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, Tuo, Seydou; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, Souza, Alain; Laboratory of Molecular and Cellular Biology, Microbiology-Immunology team; University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon, Lepengue, Alexis Nicaise; Laboratory of Plant Physiology, Plant Pathology and Plant Breeding, Agrobiology Research Unit, University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon, Koné, Daouda; Laboratory of Plant Physiology, Faculty of Biosciences, University Félix HOUPHOUET-BOIGNY Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire, and M’batchi, Bertrand; Laboratory of Plant Physiology, Plant Pathology and Plant Breeding, Agrobiology Research Unit, University of Sciences and Techniques of Masuku (USTM), BP 067 Franceville, Gabon
- Abstract
The purpose of this study was to assess in vitro the activity of four essential oils (Cymbopogon citratus, Eucalyptus citriodora, Lippia multiflora, Melaleuca quinquenervia) and the biobactericide Neco® on Gram-positive bacteria.The aromatogram and antibiogram were assessed by the agar well diffusion method and the Muller Hinton disk-agar diffusion method, respectively. Also, the minimum inhibitory concentration and the minimum bactericidal concentration were determined by the microdilution method in liquid medium.The aromatogram showed that the biobactericide Neco® induced the largest inhibition diameters (34.53 ± 11.82 - 43.92 ± 5.38 mm) of all strains combined, followed by the essential oils of Eucalyptus Citriodora (30.01 ± 3.02 - 41.89 ± 1.77 mm) and Lippia multiflora (20.72 ± 4.72 - 37.61 ± 2.80 mm). However, the essential oils of Melaleuca quinquenervia (19.99 ± 3.93 - 26.20 ± 13.27 mm) and Cymbopogon citratus (13.52 ± 3.59 - 29.08 ± 2.35 mm) had the smallest inhibition diameters. Moreover, the comparison of the activities of the aromatogram and antibiogram revealed generally that activities were higher with essential oils than with antibiotics.At the end of this study, the essential oils of Cymbopogon citratus, Eucalyptus citriodora, Lippia multiflora, Melaleuca quinquenervia and the biobactericide Neco® had an antibacterial activity on Gram+ bacteria.
- Published
- 2017
40. Internal Initiation by the Cucumber Necrosis Virus RNA-Dependent RNA Polymerase Is Facilitated by Promoter-like Sequences
- Author
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Panavas, T., Pogany, J., and Nagy, P.D.
- Published
- 2002
- Full Text
- View/download PDF
41. The effects of endophyte-infected tall fescue on production and reproductive performance parameters of beef cattle and calves
- Author
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Plant Pathology, Physiology, and Weed Science, Online Master of Agricultural and Life Sciences, Pent, Gabriel J., Fike, John H., Mercadante, Vitor R. G., Anderson, Amber A., Plant Pathology, Physiology, and Weed Science, Online Master of Agricultural and Life Sciences, Pent, Gabriel J., Fike, John H., Mercadante, Vitor R. G., and Anderson, Amber A.
- Abstract
Beef cattle production records from two Virginia Department of Corrections herds from 2012- 2019 were analyzed to determine how the cultivar of tall fescue – toxic endophyte-infected or novel endophyte-infected – impacted cattle productivity metrics. Parameters compared were artificial insemination pregnancy rates, calving rates, body weights, and body condition scores of cows and birth weights and weaning weights of calves. The experimental design was a randomized completed block design with year as the replication. Samples of tall fescue were collected from the farm locations and tested for total ergot alkaloid concentrations. The samples from the farm with toxic endophyte-infected tall fescue all contained toxic levels of ergot alkaloids while the samples from the farm with novel endophyte-infected tall fescue indicated that half of the pastures at this location did not have toxic levels of total ergot alkaloids. Artificial insemination pregnancy rates were greater (P = 0.0011) for cows on novel endophyte-infected tall fescue (52 ± 1%) than for cows on toxic endophyte-infected tall fescue (43 ± 1%). Cows on novel endophyte-infected tall fescue had greater calving rates (94 ± 1%) than cows on toxic endophyte-infected tall fescue (89 ± 1%; P = 0.0243). Body condition scores and body weights at pre-breeding were greater for the cows on novel endophyte-infected tall fescue (P=0.0153 and P=0.0456, respectively). Birthweights were reduced for calves on toxic endophyte-infected tall fescue (34 ± 0.9 kg.) than for calves on novel endophyte-infected tall fescue (38 ± 1.4 kg.; P = 0.0257). Calves on novel endophyte-infected tall fescue had greater weaning weights (278 ± 5.9 kg.) than calves on the toxic endophyte-infected tall fescue (254 ± 5.9 kg.; P = 0.0217). Cattle production was improved on the farm with novel endophyte-infected tall fescue compared to cattle production on the farm with only toxic endophyte-infected tall fescue.
- Published
- 2019
42. Survey of Powdery Mildew and Gray Mold Disease Management in Virginia and North Carolina Cut Flower Farms
- Author
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Plant Pathology, Physiology, and Weed Science, Online Master of Agricultural and Life Sciences, Hong, Chuanxue, Bosch, Darrell J., Scoggins, Holly L., Hansen, Mary Ann, Rock, Shana, Plant Pathology, Physiology, and Weed Science, Online Master of Agricultural and Life Sciences, Hong, Chuanxue, Bosch, Darrell J., Scoggins, Holly L., Hansen, Mary Ann, and Rock, Shana
- Abstract
Powdery mildew and gray mold diseases have potential to cause significant economic losses to cut flower growers. Information is needed on the effects of these diseases on growers’ returns and the effectiveness of practices to control the diseases. A survey was conducted to examine powdery mildew and gray mold disease management practices on cut flower farms in North Carolina and Virginia. Twenty cut flower farmers completed an online survey and eight of those respondents also participated in an interview. The survey gathered information about the farms, such as its acreage and number of years growing cut flowers, flower genera affected by the diseases, fungicide use and efficiency, and cultural control use and efficiency. The survey and subsequent interviews provided several major findings. First, the floral genera most affected by powdery mildew in North Carolina and Virginia were Zinnia, followed by Dahlia. The genera most affected by gray mold were Ranunculus, followed by Anemone and Dahlia. Second, crop loss due to each disease was mostly at the 0 to 10% level, with one farm losing 91 to 100% of Phlox crops to powdery mildew and another losing 81 to 90% of Tulipa crops to gray mold. Third, 40% of respondents have not used any fungicides for disease management; and for those who have, neem oil was the product they used most frequently. Fourth, all respondents considered sustainability very important when making disease management decisions; this was supported by their extensive use of cultural practices for disease control, in addition to their preference of nonchemical approaches and biorational products over synthetic pesticides. The commonly used cultural controls included, crop rotation, proper watering, disease resistant cultivars, sanitation, proper spacing, and weeding. Findings from this survey will help cut flowers growers in the Mid-Atlantic region to better manage these two important diseases.
- Published
- 2019
43. Evaluation of host plant resistance, sowing date modification and intercropping as methods for the control ofMylabris and Coryna species (Coleoptera: Meloidae) infesting pearl millet in the Nigerian Sudan savanna
- Author
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Lale, N.E.S and Sastawa, B.M
- Published
- 2000
- Full Text
- View/download PDF
44. Efficacy of host plant resistance, sowing date modification and intercropping as methods for the control of Pachnoda interrupta (Olivier) in pearl millet in the Nigerian Sudan savanna
- Author
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Sastawa, B.M and Lale, N.E.S
- Published
- 2000
- Full Text
- View/download PDF
45. Role of Emulsifiers in Plant Oil Emulsion Stability, Degradability and Biological Activity
- Author
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Bhattacharya, I.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal, Mukherjee, N.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal, Banerjee, S.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal, Bhattacharya, I.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal, Mukherjee, N.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal, and Banerjee, S.; Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741235, Dist Nadia, West Bengal
- Abstract
Emulsifiers are important important ingredients of emulsifiable concentrate (EC) formulation of pesticides which mainly impart stability to the spray emulsion. The possibility of developing formulated products of plant oils (which will be relatively stable and biologically active against brinjal root rot pathogen Macrophornma phaseolina (Tassi)Goid) has been explored with the combinations of four plant oils and three emulsifiers. Freshly prepared homogeneous O/W emulsions showing different degree of stability and degradability when kept in laboratory conditions for a considerable period of time have been studied. Biological activity towards M pheseolina was found to vary in different plant oil emulsions, while remaining active on prolonged storage.
- Published
- 2015
46. Potential Impact Of Regalia® Treatments On Tree Health And Vigor
- Author
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Plant Pathology, Physiology, and Weed Science, Yoder, Keith S., Sherif, Sherif M., Peter, Kari A., Yelvington, Alan L., Plant Pathology, Physiology, and Weed Science, Yoder, Keith S., Sherif, Sherif M., Peter, Kari A., and Yelvington, Alan L.
- Abstract
Regalia®, an extract from giant knotweed (Reynoutria sachalinensis (REYSA)), is an organic immune system response (ISR) treatment that can mitigate fungal and bacterial infections by stimulating the genetic immune response system of a plant. The mode-of-action of Regalia® is to penetrate the plant tissue and stimulate a biodynamic response to resist pathogens. The primary response to Regalia® is the production of reactive oxygen species (ROS) that disable pathogens, and a thickening of cell walls to inhibit pathogen penetration. Regalia® is an uncommon fungicide since the protection is provided by the plant itself and not directly by the agent, and because the activity is internal rather than external. This process provides protection from pathogens that get past surface protectants. Because ISR agents require plant resources to be effective, there is a risk that they can disrupt the metabolic processes of the plant, or there can be an allocation cost that could diminish the plant vigor. This study examines if the ISR activity of Regalia® presents any phytoxicity or impact to vigor in four varieties of cider apples (Malus ×domestica cvs. Dabinett, Medaille d’Or, Chisel Jersey, and Redfield). This quantitative study, based on measured metrics of plant growth during the study period, showed that Regalia, applied with Cueva or Serenade, had no effect on primary or secondary shoot length or the number of shoot leaves on any of the four test varieties.
- Published
- 2018
47. Sensitivity of Colletotrichum orbiculare Isolates in Virginia Watermelon to Thiophanate-methyl, Pyraclostrobin, and Prothioconazole
- Author
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Plant Pathology, Physiology, and Weed Science, Langston, David B., Rideout, Steven L., Taylor, Sally V., Byrd-Masters, Linda C., Plant Pathology, Physiology, and Weed Science, Langston, David B., Rideout, Steven L., Taylor, Sally V., and Byrd-Masters, Linda C.
- Abstract
Fungicide resistance development is a major concern for growers due to the limited modes of action available and the limited number of applications that can be used in the field. Determining sensitivity to fungicides and assessing risk of resistance is vital to the development of future chemistries necessary to inhibit or control pathogens. One common simple in vitro method of measuring sensitivity to fungicides is measuring radial growth of a pathogen exposed to multiple doses of fungicides in fungicide-amended agar to determine EC50 which is the concentration of fungicide that provides 50% inhibition of the isolate as compared to a non-fungicide-amended control. Colletotrichum orbiculare (syn. C. lagenaria) is the causal organism for anthracnose of cucurbits. Thiophanate-methyl and pyraclostrobin are common fungicides used to manage anthracnose in cucurbit crops. Prothioconazole, is labeled for use in cucurbits but not specifically recommended for management of anthracnose; however, control of anthracnose with fungicides containing this active ingredient has been observed in the field. A mycelial growth assay was conducted using fourteen C. orbiculare isolates collected from watermelon (Citrullus lanatus) in Southampton County, Virginia. Isolates were incubated on fungicide-amended PDA at fungicide concentrations 0 – 100 µg/mL of each fungicide, and the diameter of fungal growth on fungicide-amended and non-amended media was measured and compared to determine percentage of growth reduction. There was little variation in the fungicide sensitivity profiles of the fourteen isolates examined. Overall they were highly sensitive to pyraclostrobin (EC50 <0.1 µg/mL), and insensitive to thiophanate-methyl (EC50 > 1 µg/mL) and prothioconazole (EC50 > 100 µg/mL).
- Published
- 2018
48. Efficacy of Antagonists and Carbendazim against Dry Root Rot of Mungbean [Vigna radiata (L.) Wilczek] Incited by Macrophomina phaseolina (Tassi.) Goid under Glasshouse Conditions
- Author
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Rajeswari, B.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P., Chandrasekhara Rao, K.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P., Pramod Chandra Kumar, C.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P., Rajeswari, B.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P., Chandrasekhara Rao, K.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P., and Pramod Chandra Kumar, C.; Department of Plant Pathology, Acharya N. G. Ranga Agricultural University, Hyderabad 500 030, A. P.
- Abstract
Bioeflicacy of carbendazim tolerant isolate of Trichoderma harzianum and exotic isolates of T. viride and T. virens were evaluated against dry root rot pathogen of mungbean incited by Macrophomina phaseolina under glasshouse conditions. T. harzianum when applied to the soil besides being effective against the disease, increased seed germination by 96 per cent, plant height by 35.5cm and total biomass by 2.53 g/plant compared to T. viride and T. virens isolates. In addition, soil application of T. hazianum @ 5 g/kg and seed treatment @ 108 conidia/ml was found effective against dry root rot pathogen. Integration of T. harzianum as soil application (5g/kg) + seed treatment (108C/ml) with sub-lethal doses of carbendazim (0.02%) significantly reduced dry root rot incidence (95.3%) over soil treatment (91.5%) and seed treatment alone (86.5%).
- Published
- 2014
49. Effect of Antagonists in Combination with Carbendazim Against Macrophomina phaseolina Infection in Cowpea
- Author
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Alagarsamy, G.; Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, Sivaprakasam, K.; Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, Alagarsamy, G.; Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, and Sivaprakasam, K.; Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003
- Abstract
Pelleting of cowpea seeds with Trichoderma viride Pers: fr. either alone or in combination with carbendazimm inhibited the growth of Macrophomina phaseolina Tassi (Gold.) in vitro. The treatment increased the germination and reduced the post emergence mortality under pot culture conditions. Carbendazim did not show any adverse effect on the antagonists T. viride and T. harzianum Rifal under in vitro and also in pot culture studies. Seed pelleting with carbendazim in combination with antagoinst reduced the seedling mortality besides enhancing the growth characteristics like shoot length, root length and dry matter production.
- Published
- 2014
50. Evaluation of Plant Leaves, Oil Cakes and Agro-Industrial Wastes as Substrates for Mass Multiplication of the Nematophagous Fungus, Paecilomyces lilacinus
- Author
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Mani, A.; Citrus Project and Department of Plant Pathology, Andhra Pradesh Agricultural University, Tirupati 517 502, Anandam, R. J.; Citrus Project and Department of Plant Pathology, Andhra Pradesh Agricultural University, Tirupati 517 502, Mani, A.; Citrus Project and Department of Plant Pathology, Andhra Pradesh Agricultural University, Tirupati 517 502, and Anandam, R. J.; Citrus Project and Department of Plant Pathology, Andhra Pradesh Agricultural University, Tirupati 517 502
- Abstract
The suitability of leaves of certain plant species, oilcakes, as well as waste products of sago industry were evaluated as substrates for mass multiplication of the nematophagous fungus, Paecilomyces lilacinus (Thorn.) Samson. Leaves of subabool and neem were found to be suitable substrates and supported a highcr spore load than tanners cassia, Pongamia and Glyricidia. Tapioca tuber and its peels also supported a moderately high spore load. Untreated thippi supported the least spore load. However, the spore load of P. lilacinus was significantly increased when thippi was soaked in KH2Po4 and NaNO3 at 0.75% concentration. The oilcakes favoured the growth of P. lilacinus.
- Published
- 2014
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