Persistence of Imidacloprid, Diazinon and Lindane in Soil Under Groundnut (Arachis hypogaea L.) Cultivation

Persistence of imidacloprid, diazinon and lindane was studied in the soil under groundnut (Arachis hypogaea L.) cultivation during kharif for three consecutive years (1997 to 1999). Following seed treatment diazinon residue persisted till 60 d with average half-life (T_1/2) of 29.32 d in soil. Similarly, diazinon residue in soil treated field persisted till 60 d with average half-fife of 34.87 d. Nevertheless, seed treatment of imidacloprid and lindane resulted in their persistence in soil till 90 and 120 d with average half-life of 40.96 and 53.39 d, respectively. Within 90 d, imidacloprid residues lost from 73.17 to 82 49% while such losses for lindane residues ranged from 78.19 to 79.86% within 120 days.