Evaluation of efficacy of neonicotinoids against Aphis Gossypii Glover and Amrasca Biguttula Biguttula ishida infesting okra

Abstract

Investigations were carried out to evaluate the efficacy imidacloprid to Aphis gossypii Glover and Amrasca biguttula biguttula Ishida under field condition during summer, 2012. The results revealed that imidacloprid 17.8 SL @ 30 g a.i./ha emerged as the most effective treatment against aphids and jassids with realized yield of 60.49 q/ha. It was at par with imidacloprid 70 WG @ 30 g a.i./ha with yield of 59.26q/ha. Next in order of effectiveness were imidacloprid 70 WG @ 25 g a.i./ha, imidacloprid 17.8 SL @ 25 g a.i./ha and thiamethoxam 25 WG @ 25 g a.i./ha.