Efficacy of certain insecticides against thrips Scirtothrips dorsalis on chillies Sahani S K*, Mondal P Department of Agricultural Entomology, Palli Siksha Bhavana (Institute of Agriculture), Visva-Bharati, Sriniketan, 731236, Birbhum, West Bengal *Email: sahanishrawan@gmail.com (corresponding author)
Online published on 21 July, 2020. Abstract A field experiment was carried out with organophosphate, neonicotinoid, phenyl pyrazoles, diamides, macrocyclic lactone, thiourea, pyrethroids and botanicals against chilli thrips Scirtothrips dorsalis (Hood) during 2018. Fipronil 5% SC @50 g a.i./ha proved to be the most effective in terms of reduction of (96.16% & 76.39%, respectively) both after 1st and 2nd sprays. Other insecticides viz., diafenthiuron 50% WP @ 300 g a.i./ha, profenophos 50% EC @ 500 g a.i./ha, emamectin benzoate 5%SG @ 10 g a.i./ha, cyantraniliprole 10.26% OD @ 60 g a.i./ha, imidacloprid 17.8% SL @ 50 g a.i./ha, thiamethoxam 20% WG @ 50 g a.i./ha, lamdacyhalothrin 5% EC @ 15 g a.i./ha were also found effective. The preparation of NSKE 5% though was found less effective exerted 80.46% and 53.46% reduction in population after 1st and 2nd spray, respectively. Results on the fruit yield revealed that all the treatments increased the yield significantly. Analysis of incremental cost benefit ratio revealed that fipronil 5% SC was superior. Top Keywords Scirtothrips dorsalis, chillies, field efficacy, fipronil, NSKE, diafenthiuron, profenophos, emamectin benzoate, fruit yield, cost-benefit ratio. Top |