Persistence behavior of individual insecticides of pre-mix formulation (chlorpyrifos and cypermethrin) was studied in peel, pulp and whole sapota fruit (unripe and ripe) applied at recommended and double of recommended dose. The residues of cypermethrin and chlorpyrifos persisted up to 10-30 days at either dose in peel, pulp and whole unripe sapota fruits. The dissipation half-life (DT-50) values obtained for chlorpyrifos and cypermethrin in peel and whole fruit was in the range of to days at recommended and double the recommended dose. Residues of both insecticides were detected in unripe and ripe sapota peel but were absent in unripen sapota pulp at either doses. Chlorpyrifos residues were detected in ripe sapota pulp at both doses but cypermethrin residues were absent at recommended dose in ripe sapota pulp. The cypermethrin and chlorpyrifos residues were not detected in soil samples on 30th days at either dose but were detected in initial soil samples in both the doses. | Persistence behaviour of pre-mix formulation of Profenophos and Cypermethrinin/on sapota fruit
