EFFICACY OF SOME INSECTICIDES AGAINST WHITEFLY (BEMISIA TABACI) INFESTING COTTON UNDER FIELD CONDITIONS

Fifteen insecticides, viz. Bifenthrin 10 EC @800g/ha, Clothianidin 50WDG@ 40g/ha, Diafenthiuron 50WP@ 500g/ha, Fipronil 5SC@1500ml/ha, Imidacloprid 17.8SL@100ml/ha, Phorate 10CG@10kg/ha, Pyriproxyfen 10EC@1250ml/ha, Spiromesifen 22.9SC@ 500ml/ha, Triazophos 40EC@1500ml/ha, Verticilium lecanii 1.15 WP@2.5kg/ha, Nimbicidine@2.5lt/ha, Achook@2.5lt/ha, Acetaphate 50%+Imidacloprid 1.8 % SP@1000ml/ha, Clorpyriphos 50%+Cypermethrin 5% EC@1000ml/ha, Deltamethrin 1%+Triazophos 35%EC@1250ml/ha against untreated control were evaluated at their field recommended doses for their efficacy against whitefly (Bemisia tabaci Genn.) on cotton during 2016. The insecticides were applied at ETL of whitefly. All the test insecticides caused significant population reduction of whitefly up to 7 days after treatment. However, the most effective insecticides for whitefly, up to seven days was found to be imidacloprid followed by deltamethrin+triazaphos, achook, verticillium, chlorpyriphos+cypermethrin while rest of the insecticides were found to be equally effective. Fipronil remained least effective.