Dissipation pattern of the herbicide Pyrazosulfuron- ethyl in Alluvial and red lateritic soils of West Bengal

摘要: The sulfonylurea herbicide pyrazosulfuron- ethyl [Ethyl 5- (4, 6- dimethoxy pyrimidine- 2- yl carbamoyl sulfamoyl) -1 – methyl pyrazole- 4- carboxylate] is a systemic absorbed by roots and leaves translocates to the meristem. Dissipation of follows first order kinetics in both alluvial red lateritic soils West Bengal under laboratory condition when applied @ 10 g (T1) 20 (T2) active ingredient per gram soil. About 80% initial concentration soil was dissipated 30 days which further increased more than 95% 60 days. rate dissipation found be similar (DT50 ~ 15 days) for soils.