Bioefficacy of conventional and newer insecticides against aphids, M. persicae (Sulzer) of tomato in Varanasi region

Abstract

Nine insecticidal treatments viz., chlorantraniprole 18.5% SC @ 30 g a.i./ha, flubendiamide 39.35% SC @ 48 g a.i./ha, lambda-cyhalothrin 5% EC @ 15 g a.i./ha, Beauveria bassiana @ 1X 1012 spore/ml, NSKE 5% @ 1000 ppm, novaluron (IGR) @ 75 g a.i./ha, imidacloprid 17.8% SL @ 30 g a.i./ha, indoxacarb 14.5% SC @ 70 g a.i./ha and spinosad 45% SC @ 70 g a.i./ha were field evaluated against aphids population. Results revealed that foliar spray of imidacloprid 17.8% SL @ 30 g a.i./ha was found to be the most effective treatment followed by indoxacarb 14.5% SC @ 70 g a.i./ha and spinosad 45% SC @ 70 g a.i./ha taking into account of its better efficacy against aphids with overall per cent reduction over control of 70.69, 62.92 and 56.04 during year I and 75.55, 66.80 and 63.84 during year II. Minimum population of aphids was recorded in NSKE 5% @ 1000 ppm.