Vol. 12, Issue 5 (2023)

Author(s):
Dhananjay Venkatrao Patil and Usha Yadav

Abstract:
A field experiment was conducted during kharif 2022 at Central Research Farm, SHUATS (Sam Higginbottom University of Agriculture, Technology and Sciences), Prayagraj, Uttar Pradesh (India). Randomized Block Design with eight treatments and replicated thrice. The Result showed that the effects of biopesticides against Helicoverpa armigera, among the different treatments, the lowest larval population of cowpea pod borer was recorded in Bacillus thuringinsis (1×10⁸ CFU) (1.334). Beauveria bassiana 1.15% SG (1.445) was found as the next best treatment followed by Neem oil 1500ppm (1.511), HaNPV (1×10⁹) (1.600) and NSKE10% (1.667), Metarhizium anisopliae 1×10⁸ CFU (1.756) whereas Azadirachtin (10000ppm) (1.834) was found to be least effective against this pest. Among the treatments studied, Bacillus thuringiensis (1x10⁸ CFU) gave the highest cost benefit ratio (1:4.30) and marketing yield (18.46 q/ha) followed by Beauveria bassiana 1.15% SG (1:3.84 and 16.78 q/ha), Neem oil 1500ppm (1:3.47 and 15 q/ha), HaNPV (1x10⁹ POB) (1:2.90 and 12.20 q/ha), NSKE 10% (1:2.67 and 11.54 q/ha), Metarhizium anisopliae 1x10⁸ CFU (1:2.31 and 10.80 q/ha) and Azadirachtin (10000 ppm) (1:2.05 and 9.20 q/ha).