Bio-efficacy of insecticides against thrips infesting bitter gourd

Abstract

The present investigation was carried out to study the bio-efficacy of insecticides against thrips infesting bitter gourd during rabi-summer season of 2017-18 at Centre of Excellence for Mango, College of Agriculture, Dapoli, Dist. Ratnagiri (M.S). There were six insecticides tested against thrips infesting bitter gourd. The results regarding overall mean of three sprays against thrips infesting bitter gourd revealed that the treatment chlorantraniliprole 18.5 SC @ 0.005 per cent was the best treatment which recorded minimum (2.41) population of thrips and was at par with malathion 50 EC @ 0.05 per cent (2.84) and spinosad 45 SC @ 0.014 per cent (3.05). The next effective treatment was emamectin benzoate 5 SG @ 0.002 (3.53) which was at par with treatments azadirachtin 1 EC @ 0.003 per cent (3.65) and lambda cyhalothrin 5 EC @ 0.0025 per cent (3.75). All the treatments were significantly superior over untreated control. The maximum (6.78) thrips population was observed in the untreated control.