Abstract
A field experiment was conducted during winter season of 2017-18 to evaluate the effectiveness of different module based application of insecticide against thrips (Scirtothrips dorsalis Hood) infesting chilli (Capsicum frutescens) to find out best combination against thrips and subsequent reduction in curling in plant with higher cost benefit ratio. The effectiveness of two biopesticides viz. NSKE and Rose apple LE along with five synthetic insecticides were evaluated in the field of new gangetic zone of West Bengal. It is evident from the result of present investigation that a combination of NSKE, emamectin-benzoate and chlorfenapyr sequentially in the field were most effective to minimize the thrips population 74.56% over control. Neem pesticide (57.33%) and rose leaf extract (55.81%) were found moderately effective. Although all the chemical proves effective on the thrips population over control but the NSKE and rose leaf extract considered to be more effective over the beneficial arthropod diversity and pollinators in chilli ecosystem.
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