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Effects of sorghum residue in presence of pre-emergence herbicides on emergence and biomass of Echinochloa colona and Chloris virgata
- Source :
- PLoS ONE, PLoS ONE, Vol 15, Iss 3, p e0229817 (2020)
- Publication Year :
- 2020
- Publisher :
- Public Library of Science (PLoS), 2020.
-
Abstract
- In conservation agriculture systems, farmers gain many advantages from retaining crop residue on the soil surface, but crop residue retention in these systems may intervene with the activity of pre-emergence herbicides. A pot study was conducted to evaluate the effect of different rates of pre-emergence herbicides [imazethapyr (100 and 150 g a. i. ha-1), isoxaflutole (100 and 200 g a. i. ha-1), metolachlor (1.5 and 2.25 kg a. i. ha-1), pendimethalin (2.25 and 3.38 kg a. i. ha-1) and prosulfocarb + metolachlor (2.5 and 3.75 kg a. i. ha-1)] on seedling emergence and biomass of Echinochloa colona and Chloris virgata when applied in the presence of sorghum residue at rates equivalent to (0, 3 and 6 t ha-1). When seeds of E. colona and C. virgata were not covered with sorghum residue, the seedling emergence and biomass of both weeds was inhibited by 93-100% and 56-100%, respectively, with the application (both rates) of isoxaflutole, metolachlor, pendimethalin and prosulfocarb + metolachlor. Using sorghum residue resulted in lower herbicide efficacy on both weeds. At 3 t ha-1 sorghum residue, E. colona emergence and biomass reduced by 38-100% and 30-100%, respectively, with application of isoxaflutole, metolachlor and pendimethalin (both rates) in comparison with the no-herbicide treatment. Similarly, the emergence and biomass of C. virgata was also reduced by 92-100% and 25-100%, respectively. The results of this study suggest that crop residue may influence efficacy of commonly used pre-emergence herbicides and that the amount of crop residue on the soil surface should be adjusted according to the nature of the pre-emergence herbicides to achieve adequate weed control.
- Subjects :
- 0106 biological sciences
Crop residue
Science
Weed Control
Plant Weeds
Soil Science
Crops
Plant Science
Echinochloa
01 natural sciences
chemistry.chemical_compound
Agricultural Soil Science
Grasses
Sorghum
Multidisciplinary
biology
Herbicides
Plant Anatomy
Ecology and Environmental Sciences
Organisms
Biology and Life Sciences
Eukaryota
Agriculture
04 agricultural and veterinary sciences
Plants
Weed control
biology.organism_classification
Chloris virgata
Pendimethalin
chemistry
Agronomy
Seedlings
Seedling
Seeds
040103 agronomy & agriculture
Medicine
0401 agriculture, forestry, and fisheries
Weeds
Edible Grain
Agrochemicals
Metolachlor
Research Article
Crop Science
010606 plant biology & botany
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- PLOS ONE
- Accession number :
- edsair.doi.dedup.....22b0155fdce4ab5c6d43798bd8eada19