Evaluation of certain newer insecticides against pod fly (Melanagromyza obtusa) and pod borer (Helicoverpa armigera) on long duration pigeonpea

Abstract

The investigations on efficacy of different newer insecticides action (Acetamiprid 20 SP @ 20 g a. i./ha, spinosad 45% SC @ 73 g a. i./ha, rynaxypyr 18.5 SC 30 g a. i/ha, dimethoate 30 EC @ 600 g a. i./ha, profenophos+DDVP 20 ml+0.5 ml/l, acephate 75 SP @ 750 g a. i./ha) against pod fly (Melanogromyza obtusa Malloch) and pod borer (Helicoverpa armigera Hubner) on long duration pigeonpea variety "Bahar" were carried out at Agricultural Research Farm of Banaras Hindu University during the kharif seasons of 2012-13 and 2013-14. Among the insecticides tested, the lowest pod and grain damage by H. armigera was recorded in the plot treated with rynaxypyr 18.5 SC @ 30 g a. i./ha (1.66 &2.67% and 0.53 &2.05%, respectively) which was at par with spinosad 45% SC @ 73 g a. i./ha (2.00 &3.33% and 0.57 &2.51%, respectively). While in case of pod fly, the lowest pod and grain damage was recorded in the plot treated with spinosad 45% SC @ 73 g a. i./ha (22.66 &23.00% and 11.55 &7.74%, respectively) which was at par with acetamiprid 20 SP @ 20 g a. i./ha (26.66 &24.33 and 11.78 &8.68%, respectively).