Degradation of the sulfonylurea herbicide [14C]amidosulfuron (HOE 075032) in Saskatchewan soils under laboratory conditions

The degradation of the herbicide [ 14 C] amidosulfuron (HOE 075032) was studied in three Saskatchervan soils at 0.1 μg/g under controlled temperature and moisture conditions. At 85% of field capacity, degradation approximated to first-order kinetics at soil temperatures of 10, 20, and 30 o C, with half-life values ranging from 14±2 days (mean and standard deviation) in a loamy sand incubated at 30 o C to 231±41 days in a clay at 10 o C