Effect of certain insecticides on egg batch of Sycanus collaris (Insecta: Hemiptera: Reduviidae)

Abstract

The impact of agrochemicals on the reduviid bug egg batch is covered for the first opportunity in this study. One of the prevalent predators in the agroecosystem is Sycanus collaris. Post development of hatching rate and survival of Sycanus collaris egg batch were studied for six commonly used insecticides in the tea agroecosystem namely Flubendiamide + Thiacloprid, Thiamethoxam + L-cyhalothrin, Bifenthrin, Pungamia Soap, Neem Soap and Emamectin benzoate. Maximum effect was observed in 2× recommended dosages of Bifenthrin and Thiamethoxam+ L- cyhalothrin treated egg batches followed by Emamectin benzoate and Flubendiamide + Thiacloprid and least effects were recorded in the neem soap and pungamia soap applied egg batches. This study paves an idea on the survivability of nymphs where the egg batch is exposed with the insecticide. This experiment reveals Bifenthrin has the lowest survival rate in all the dosages followed by the Thiamethoxam+ L- cyhalothrin and Flubendiamide + Thiacloprid in the double recommended dose of field recommendation. The study hence concluded that the application of pesticide will also have impact on the egg hatchability and fecundity of the natural enemies under the field condition.