Efficacy of fenvalerate as contact poison against the larval development and viability of mutant form (Sepia) of Drosophila melanogaster (Meigen).

Fenvalerate, a synthetic pyrethroid, was analysed for its toxic effects on Drosophila melanogaster. It has been estimated that LC50 0.0166 micro 1/100 ml food is threshold of lethality. These studies have also revealed that fenvalerate is toxic as it had a pronounced effect on the rate of development and viability.

Effect of nicotine (plant extract) on sex-ratio of Drosophila melanogaster (Meigen).

Experiments were conducted by using nicotine (plant extract) for its toxic effects on Drosophila melanogaster, LC50 estimated is 2.9552 microl/100 ml. Studies revealed that nicotine affects adult emergence of males and females (sex-ratio) of mutant form (Yellow) of Drosophila melanogaster.