Abstract

An experiment was conducted in kharif season during 2013 and 2014 to find out the bioefficacy of newer diamide class molecule against semiloopers (Chrysodeixis acuta and Gesonia gemma) in soybean. The present study was undertaken to find out the bioefficacy of tetraniliprole SC 200 (w/v) (BCS CL 73507 SC 200) of different doses along with chloranthraniliprole 18.5 SC and triazophos 40 EC against semiloopers in soybean. The results revealed that tetraniliprole @ 50 g a. i./ha or 60 g a. i./ha was the most effective dose in reducing the semilooper larval population in soybean. It was followed by tetraniliprole @ 40 g a. i./ha or chloranthraniliprole 18.5 SC @ 30 g a. i./ha which was significantly superior over triazophos 40 EC @ 250 g a. i./ha and untreated control. The pooled mean data of both the years on seed yield also proved similar results and showed an incremental yield of 11.2 and 13.8 q/ha for tetraniliprole @ 50 and 60 g a. i./ha, respectively, over untreated control, then followed by treatments tetraniliprole @ 40 g a. i./ha, chlorantraniliprole @ 30 g a. i./ha and triazophos @ 250 g a. i./ha with a mean seed yield of 11.5 to 20.2 q/ha and an incremental yield of 2.5 to 11.2 q/ha over untreated control. This diamide class molecule, tetraniliprole has a unique mode of action and is effective against devastating pests of soybean which can be new tool for integrated pest management programmes.