Field efficacy and economics of selected insecticides against gram pod borer [Helicoverpa armigera (Hubner)] on greengram [Vigna radiata (L.) Wilczek]

Abstract

A field trial was conducted at central research farm, SHUATS during kharif season of 2023. Eight treatments including control were evaluated against Helicoverpa armigera i.e. Chlorantraniliprole @ 18.5% SC, Imidacloprid @ 17.8% SL, Bacillus thuringiensis @ 4% WSP, Indoxacarb @ 14.5% SC, Spinosad @ 45% SC, Fipronil @ 5% SC, Azadirachtin (Neem oil @ 5%) and Control. Results revealed that, among all the different treatments lowest population of Helicoverpa armigera was recorded in Chlorantraniliprole @ 18.5 SC (0.73). Spinosad 45% SC (1.19) was found to be the next best treatment followed by Indoxacarb @ 14.5 SC (1.08), Imidacloprid @ 17.8 SL (1.19), Fipronil @ 5% SC (1.26) . The least effective treatments were Bacillus thuringiensis @ 4% WSP (1.35) and Azadirachtin (Neem oil 5%) (1.45) but superior as compared to untreated Control plot. The highest yield was recorded in Chlorantraniliprole 18.5% SC (17.2 q/ha) followed by Spinosad 45% SC (16.2 q/ha), Indoxacarb 14.5 SC (14.7 q/ha), Imidacloprid 17.8% SL (14 q/ha), Fipronil 5% SC (13.2 q/ha), Bacillus thuringiensis 4% WSP (12.2 q/ha) and Azadirachtin (Neem oil 5%) (12.1 q/ha), as compared to control plot (4 q/ha). Among the treatments studied, the best and most economical treatment was Chlorantraniliprole 18.5% SC (1:4.00) followed by Spinosad 45% SC (1:3.95), Indoxacarb 14.5 SC (1:3.92), Imidacloprid 17.8% SL (1:3.90), Fipronil 5% SC (1:3.65), Bacillus thuringiensis 4% WSP (1:3.23), Azadirachtin (Neem oil 5%) (1:3.14), as compared to control plot (1:1.20).