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Background: Pod sucking bug (Riptortus linearis F. Hemiptera: Alydidae) is one of the major insect pest in soybean that cause yield loss up to 79%. This study was carried out to identify the level of resistance to pod sucking bug on soybean genotypes. Methods: Field research was conducted at Muneng Experimental Farm, Probolinggo, East Java, Indonesia in the Dry Season (March-June) 2019. A randomized block design repeated two times were used on a total of 16 soybean genotypes included two varieties (Anjasmoro and Gema) as check. The experiment consisted of two growing environments namely controlled environment (P1): two insecticides with active ingredients Deltamethrin and Fipronil were applied to soybean crops alternately; and uncontrolled environment (P0): no insecticide was applied to soybean crops Observations were recorded on the intensity of borer attack and dry seed weight. Result: In uncontrolled environment (P0), the percentage number of infected seed to healthy seed was higher than that in controlled environment (P1). The mean effectiveness of control of pod sucking was 35% which was based on infestation intensity of seed number/plant infected in in two environments. The total seed weight/plant in controlled environment (P1) was 95% higher than that in uncontrolled environment (P0). Based on infestation intensity in uncontrolled environment (P0), five genotypes (G1 to G5) were categorized as resistant against pod sucking bug while the check varieties Anjasmoro and Gema were categorized as moderate resistant and susceptible, respectively. [ABSTRACT FROM AUTHOR]

Background: Pests and diseases infestations reduce the quantity and quality of seed yields. The objective of this study was to identify the correlation value between level of resistance to pests and chemical (fat and protein) concentrations of soybean genotypes. Methods: A total of 15 soybean genotypes were planted in field and glass house environments in 2017. Observations were made on the infestation intensity of pest and disease, dry seed yield, yield components and chemical (fat and protein) concentrations. Result: Soybean genotype DG-91-8 showed resistant (R) category to pod borer and pod sucker, while DM-122-35-17 showed resistant (R) category to army worm and pod borer. Two highest yielding genotypes (DG-91-8 and DG-99-32-14) had 15% higher seed yield than check variety Dering 1 (2.41 t/ha), with higher 100 seeds weight and pod number/plant. Fat concentration showed a significant positive correlation value with leaf rust disease. Pod suckers showed a significant positive correlation value with pod borer infestation, indicating that they had the same preference for soybean pods. Soybean genotypes DG-91-8 showed high seed yield (2.70 t/ha) and resistant (R) level to pod borer and pod sucker. [ABSTRACT FROM AUTHOR]

Background: Saline land can be used to increase soybean planting area. Adaptive varieties is one of technology to utilize saline land for soybeans. The objective of this study was to determine the phenotype and genotype performance of the F3 generation soybean lines in saline soil of Indonesia. Methods: A total 247 soybean genotypes, including four check varieties, were planted in augmented design in 2018. The field electrical conductivity (EC) value before planting soybean was 10.4 dS/m and soil acidity was 8.1 which was classified as high saline land based on Jones (2002). Result: The number of selected plants were 172 single plants. GH K13/ Anjasmoro lines has an opportunity to further selection. Average height of GH K13/ Anjasmoro selected lines was 26.4 cm, number of fertile nodes was 11, number of filled pods was 27 and seeds weight per plant was 4.8 g. GH K13/ Anjasmoro lines has a high broad sense heritability for plant height, number of branches and number of filled pods, also high genetic advance for all characters. [ABSTRACT FROM AUTHOR]

Background: Pod borer, Maruca testulalis is one of the harmful mung bean pests and cause substantial damage to the crop or failure to harvest. This study was carried out to identify the level of resistance to pod borer of mungbean accessions. Metohds: Field research was conducted at Muneng Experimental Farm, Probolinggo, East Java, Indonesia in the 2018 dry season using the randomized block design and repeated two times. A total of 50 accessions of mungbeans were planted in two growing environments, namely: L1 = controlled environment (Maruca pest was controlled with NPV biopesticide 2 g/liter of water) and L2 = uncontrolled environment (Maruca pest was not controlled with any kind of pesticide). Observations were made on the intensity of borer attack and dry seed weight. Result: Eleven accessions gave a low resistant (LR) to moderately resistant (MR) categories responses against M. testulalis attacks. The pod damage from the eleven selected accessions was less than 15% under environmental conditions without control (L2). Control application (L1) reduced pod damage by 48.5% and increased mung bean seed yield by 25%, compared to without control (L2). The eleven accessions that were consistent or stable with low attack intensity under conditions with and without control gave dry seed weights above average, except for accessions (MLGV 0054, MLGV 0115 and MLGV 0320) which had dry seed weights lower than the average both in the growing environment with control (L1) or without control (L2). [ABSTRACT FROM AUTHOR]