Bioefficacy and Economics of Certain Novel Generation Insecticides against Spotted Pod Borer, Maruca vitrata (Geyer) in Greengram (Vigna radiata L.)

Spotted pod borer, Maruca vitrata, cause greater damage by attacking flowers, pods in greengram plants. This study investigates the efficacy and economics of certain novel insecticides when sprayed against spotted pod borer in green gram.

The experiment was conducted at Crop Research Center, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, during kharif 2019 in randomized block design with eight treatments (Emamectin benzoate, Spinosad, Chlorantroniliprole, Indoxacarb, Novaluron, Profenophos, Triazophos and control) and three replications on variety SML668. Observations were taken at three, seven and eleven days after the first and second spray and the data thus recorded were analyzed.

The insecticide Chlorantraniliprole 20SC @ 0.025 ml/lit has shown the highest efficacy with low per cent pod damage (7.33) and maximum grain yield (8.61 q/ha) against M. vitrata from the first day of application followed by Spinosad 45SC @ 0.25 ml/lit with pod damage of 10.67 per cent and grain yield of 5.08 q/ha. The highest cost-benefit ratio was obtained in Emamectin benzoate treatment (1:8.54), followed by chlorantraniliprole (1: 6.76).