Bioefficacy of insecticides against onion thrips (Thrips tabaci Lindeman) and their influence on yield of onion bulb

Abstract

Field experiments were undertaken at the Department of Agril. Entomology, Post Graduate Institute, MPKV, Rahuri, Maharashtra, India to study the bioefficacy of imidacloprid + spirotetramat @ 75+75 g a.i./ha along with certain commonly used insecticides viz., fipronil @ 30 g a.i./ha, dimethoate @ 200 g a.i./ha, lamda-cyhalothrin @ 15 g a.i./ha, profenophos @ 250 g a.i./ha, flonicamide @ 75 g a.i./ha and chlorpyriphos @ 200 g a.i./ha against onion thrips, Thrips tabaci Lindeman, during 2020-21. Study revealed that fipronil @ 200 g a.i./ha was significantly superior over other treatments and was most effective to control thrips population (3.26 thrips/plant). It was followed by dimethoate @ 200 g a.i./ha (5.40 thrips/plant) and profenophos @ 250 g a.i./ha (5.92 thrips/plant).