Evaluation of bio-efficacy of new generation insecticides, botanicals and microbial insecticides on leaf webber of amaranth

Abstract

Hymenia recurvalis is a major leaf eating pest on vegetable amaranth. A laboratory study was conducted on evaluation of bio-efficacy of new generation insecticides against H. recurvalis. New generation insecticides (chlorantraniliprole - 0.006%, novaluron - 0.015%, flubendiamide - 0.0096%, spinosad - 0.015%,emamectin benzoate - 0.002%, indoxacarb - 0.015%, thiacloprid - 0.036%, and fipronil - 0.01%), botanicals (NSK 5 ml L-1 and oxuron 5 ml L-1) and microbial insecticide, Bacillus thuringiensis kurstaki were evaluated in vitro. Chlorantraniliprole 0.006%, flubendiamide 0.0096%, emamectin benzoate 0.002%, indoxacarb 0.015%, thiacloprid 0.036%, fipronil 0.01% and B.t k 5 ml L-1 were found to be effective under laboratory conditions and field studies were conducted using these effective insecticides. Under field studies, flubendiamide 0.0096% was found effective in managing H. recurvalis with least toxicity to non-target organisms such as spiders.