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Abstract
Effects of metolachlor on the activities of cellulase, phosphatase, urease and protease in a loamy sand soil, were evaluated for up to 28 days. Metolachlor at 10 ppm and above caused a reduction in phosphatase and urease activities for the entire period of study. The cellulase activity decreased during the very first day of incubation compared to that of the control but a recovery trend was obvious at all concentrations from day 14 onwards. Protease activity was also reduced in the metolachlor treated soil and the lower activity was observed during the entire study.