Efficacy of insecticides against cashew leaf miner, Acrocercops syngramma Meyrick (Lepidoptera, Gracillariidae)

Abstract

Experiments were conducted to know the efficacy of different insecticides (Cyantraniliprole 10.26 % OD @ 1.8 ml L-1, Dinotefuran 20 % SG @ 0.3 g L-1, Chlorfenapyr 10 % SC @ 1.5 ml L-1, midacloprid 17.8 % SL @ 0.3 ml L-1, Thiamethoxam 25 % WG @ 0.3 g L-1, Lambda cyhalothrin 2.5 % EC @1 ml L-1) against cashew leaf miner, Acrocercops syngramma Meyrick under field condition and under nursery condition Among the different insecticides evaluated, under field condition, Lambda cyhalothrin was found to be statistically superior over all other treatments recording 83.39 per cent reduction over control. Imidacloprid was found least effective against leaf miner (46.41% reduction of over control). Under nursery condition, Lambda cyhalothrin recorded 79.13 per cent reduction whereas Imidacloprid recorded only 20.31 per cent.