DETERMINATION OF DDT AND DDE RESIDUES IN COTTON, GOSSYPIUM HIRSUTUM FOLIAGE

Abstract

DDT and DDE as DDT metabolite on cotton foliage were studied. Seven rounds of DDT 50EC @1.5 liter /acre were deployed on cotton crop. First deployment was made after 40 days of spouting, thereafter, six subsequent applications were made at the intervals of 20, 20 15, 30, 15 and 20 days. Initially cotton foliage samples were drawn at 10 days post treatment and thereafter, sample were collected after an interval at 90 days age of the crop. The crop was found contaminated maximum with 0.25 mg/kg DDT and its metabolite as DDE and minimum 0.15 and 0.19 mg/kg DDT and its metabolite, respectively, while DDD was not detected in any case, employing GC-ECD.