IMPACT OF SELECTED INSECTICIDE (FENVALERATE) ON THE RE- PRODUCTIVE POTENTIAL OF MUTANT DROSOPHILA MELANOGASTER INFLUENCE OF AGE AT THE TIME OF TREATMENT ON STERILITY.S.A. Choudhar
Fenvalerate induced complete sterility in either sex of mutant (Curled) of Drosophila melanogaster when applied topically check to newly emerged flies a! a dose of 0.007 OAL/100 mL food. However, the recovery of fertility was recorded as the treatment days increased. In cross combinations, where either male or female or both were treated, egg laying was delayed by 11-19 days as compared to control. Recovery of fertility was faster in Fi generation. Also, the flies treated at emergence, remained sterile for longer period than the flies treated at maturity. % egg hatch and corrected % sterility in the flies treated at maturity for the first and subsequent three weeks and % egg hatch of successive egg batches in the flies treated on emergence showed that the F, generation was more effective than Fi generation.
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