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KMID : 0903519880310020200
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1988 Volume.31 No. 2 p.200 ~ p.204
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Effect of Some Soil Properties on Degradation of Herbicide Pretilachlor in Soils
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Abstract
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This study was conducted to evaluate effect of soil texture, organic matter, temperature and water regime on degradation of pretilachlor (2-chloro-2´, 6´-diethyl-N-(n-propoxyethyl) acetanilide) in the soils. The period of residual activity in soil treated with pretilachlor at rate of 60g a.i./10a was about 50 days. Also, period of reaching GR 50 value on the barnyard grass was about 25∼27 days. Degradation rate of pretilachlor in the sandy clay loam soil which has higher contents of organic matter and clay was faster than in the sandy loam soil. When organic matter was added to the soil, the rate of decomposition was accelerated. The faster degradation occurred under the 30℃ soil temperature by comparison under the 20℃. The rate of degradation in the soil was faster under the flooded conditions than under the wetted conditions.
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