Evaluation of few insecticides against insect pests of cashew

Abstract

Efficacy of certain insecticides against cashew insect pests was tested in the experimental farm of the Regional Research Centre, BCKV, Jhargram during 2014-15 and 2015-16. Among the insecticides applied Lambda cyhalothrin @ 0.003% showed maximum efficacy to control leaf and blossom webber (9.57%) and leaf miner (8.4%) of cashew 30 days after first spray while acetamiprid @0.01% was also reported equally effective against the same insects and were statistically at par. Acetamiprid (0.01%) was recorded as most effective treatment to control apple and nut borer with 2.89% of damage which was closely followed by lambda cy-halothrin (2.97%) at 30 days after third spray. The trees treated with Neem oil soap @ 4% followed by Lambda Cyhalothrin @ 0.003% followed by again Neem oil soap was recorded superior to control thrips over the other treatments applied. However, imidacloprid @ 0.011% was recorded as least effective treatment to control cashew insects in the present study.