Efficacy of novel insecticides against mustard aphid Lipaphis erysimi (Kaltenbach)

An examination was carried out to study in randomized block design with three replications at Crop Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut during rabi 2014-15, the evaluation of novel insecticides viz., imidadoprid, acephate, chlorpyriphos, fipronil, thiamethoxam, dimethoate, and pymetrozine, against L. erysimi revealed that all the treatments schedule proved better than control at all the time intervals after each spray. The thiamethoxam 25% WG @100 g/ha was found most effective treatment in reducing the aphids population followed by acephate 75 SP @ 500g/ha. The pymetrozine 50 WG @ 250 g/ha was recorded less effective. Among conventional insecticides imidadoprid 17.8 SL @ 150 ml/ha was found more effective than dimethoate 30% EC @ 1000 ml/ha and fipronil 5 SC @ 1000 ml/ha. The higher yield was obtained from thiamethoxam 25% WG @100 g/ha with (17.15 q/ha) whereas, highest cost benefit ratio is obtained from imidadoprid 17.8 SL @ 150 ml/ha with (1:9.54).