Vol. 12, Special Issue 7 (2023)

The performance of each treatment was judged on the basis of survival larval population of pod borer, per cent pod infestation, grain yield and ICBR. In each treatment, three sprays were given at an interval of 15 days initiating the first spray at 50 per cent flowering.

Studies on evaluation of different biopesticides against H. armigera, E. atomosa, M. obtusa and M. vitrata in comparison with chemical insecticide (Chlorantraniliprole 18.5%) at fortnightly interval. The treatments Azadirachtin (1500 ppm) and NSE (5%) were found most effective in controlling with Maximum yield of pigeonpea and ICBR, respectively. The results of present investigation revealed that, Azadirachtin (1500 ppm), NSE (5%), and Neem Leaf Extract were highly effective by recording lowest survival of larval population and per cent pod damage.

Maximum grain yield (30.54 q/ha) was recorded from the plot treated with (Chlorantraniliprole 18.5%) with ultimately registered maximum net profit Rs.105819/-. Amongst the biopesticides higher grain yield (27.18 q/ha) registered from treatments Azadirachtin (1500 ppm) with maximum net profit of Rs. 84375/-. The maximum Incremental cost benefit ratio was however obtained from the plot treated Azadirachtin (1500 ppm) (1:8.01) and Chlorantraniliprole (1:9.50).