Bio-efficacy of novel insecticides on green apple aphid, Aphis pomi in Kashmir

Laboratory bioassay of seven selected insecticides namely imidacloprid, acetamiprid, thiamethoxam, diafenthiuron, spiromesifen chlorfenapyr and dimethoate was carried out at Plant Protection Laboratory of KVK Anantnag to evaluate the bio-efficacy of novel insecticides against green apple aphids (Aphis pomi) during 2020 and 2021. The Relative efficacy based on LC50 values was conducted using two bioassay methods viz., leaf dip and direct spray method. Relative efficacy of imidacloprid (8.022) was highest in leaf dip method followed by thiamethoxam (2.419) while in direct spray method Spiromesifen (1.948) showed highest efficacy followed by thiamethoxam (1.617). Results of this study indicated that out of selected seven insecticides, neonicotinoid insecticide were highly effective against green Apple aphid.