Bio-efficacy of certain insecticide against Helicoverpa armigera (Hubner) on green gram (Vigna radiata L.)

Abstract

Studies on the “Bio-efficacy of certain insecticide against Helicoverpa armigera (Hubner) on green gram (Vigna radiata L.)” at field condition was carried out during kharif season 2022 at Koirengei, Imphal,Manipur, India, in a randomized block design with eight treatments replicated three times using Raiyur seeds in a plot size of 2m x 2m at a spacing of 30cm x 10cm with a recommended package of practices excluding plant protection. The soil of the experimental site was well drained and medium high. The experiment was conducted in randomized block design with three replications. A good tilth area will be divided into three main blocks. Each main block was sub-divide into 9 sub- plots each of which was be of 2m x 2m with maintaining 30cm orders as bunds and the treatments was assigned randomly. It could be concluded that for the management of green gram pod borer and yield Chlorantraniliprole 0.3ml/lit on green gram crop, recommended insecticide schedule of Chlorantraniliprole 0.3ml/lit proved to be most effective and economical followed by Spinosad 0.6ml/lit, Flubendamide 150gm/ha, Emamectin benzoate 0.4gm/lit and Imidacloprid 0.50ml/lit. The highest yield was recorded in Chlorantraniliprole 0.3ml/lit (15.36 q ha-1) followed Spinosad 0.6ml/lit, Flubendamide 150gm/ha, Emamectin benzoate 0.4gm/lit and Imidacloprid 0.50ml/lit.