Vol. 11, Special Issue 8 (2022)

Author(s):
Bhukya Sai Sireesha and Ashwani Kumar

Abstract:
A field trail was conducted at Central research farm, SHUATS kharif season of 2021. Eight treatments including control were evaluated against H. armigera. The result of the efficacy of treatments on first spray showed that, among all the treatments lowest per cent reduction of green gram pod borer was recorded in Chlorantraniliprole 18.5 SC (74.211) followed by Spinosad 45 SC (69.47), Indoxacarb 14.5 SC (66.257), Neem oil 2% (64.266), Ha NPV 250 LE (59.031), Bacillus thuringiensis 4% WSP (54.755) and Beauveria bassiana 1.15% WP (52.081) is found to be least effective but comparatively superior over the control. According to the data of second spray, it showed that Chlorantraniliprole 18.5 SC (74.422%) is found to be most effective. Followed by Spinosad 45 SC (70.523%) and Indoxacarb 14.5 SC (67.017%). Treatments Neem oil 2% (64.220%) and Ha NPV 250 LE (60.938%) was found to be average. Bacillus thuringiensis 4% WSP (55.893%), Beauveria bassiana 1.15% WP (52.382%) was found to be less effective in reducing the larval population of Helicoverpa armigera but comparatively superior over the control. While, the highest yield 16.9 q/ha was obtained from the treatment when cost benefit ratio was worked out, interesting result was achieved. Among the treatments studied, the best and most economical treatment was Chlorantraniliprole 18.5 SC (1:4.13) followed by Spinosad 45 SC (1:3.99), Indoxacarb 14.5 SC (1:3.94), Neem oil 2% (1:3.52), Ha NPV 250 LE (1:3.59), Bacillus thuringiensis 4% WSP (1:3.39), Beauveria bassiana 1.15% WP (1:3.18), as compared to control plot (1:1.19).