Relative toxicity of different insecticides against cumin aphid, Aphis gossypii (Glover)

Abstract

Present investigations on relative toxicity of different insecticides against aphid, Aphis gossypii infesting cumin were carried out under laboratory condition by using leaf dip method of bioassay against adult of aphid during 2019-2020 at Junagadh Agricultural University, Junagadh. The results of the relative toxicity of five selected insecticides showed that imidacloprid was the most toxic as its LC50 value 0.00542 per cent. On the other hand, difenthiuron was the less toxic insecticides (LC50=0.1589). Reported the LC50 value of different insecticides under test, they can be arranged in descending order as under: Imidacloprid>flonicamid>dimethoate > flupyradifurone > difenthiuron.