Effectiveness of pre-mix formulation fipronil 15% + emamectin benzoate 5% WdG against thrips (Scirtothrips dorsalishood) and fruit borerHelicoverpa armigera(hübn) of chilli

Abstract

Field evaluation of the bio-efficacy of pre-mix insecticide fipronil 15% + emamectin benzoate 5% WDG along with traditional insecticides as foliar spray against chilli thrips, Scirtothrips dorsalis and fruit borer, Helicoverpa armigera was undertaken at district seed farm (AB block) of BCKV, located at Kalyani, West Bengal and in a farmer's field at Kakdwip (24 Parganas South), West Bengal respectively under irrigated conditions with a HYV chilli cultivar “Bullet”. The treatment at higher dosages (500, 750 and 1000 ml/ha) followed by lower dose 400 ml/ha was superior over standard check treatments fipronil 5% SC and emamectin benzoate 5% SG. The highest yield was obtained in case of higher dosages (16.15–18.00 q/ha). The survival of thrips was minimum in treatments with high dosages with mean ranging from 2.25–2.87 number of thrips/leaf. It was relatively safe to important natural enemies like Menochilus sp. and Coccinella sp.