Vol. 12, Issue 6 (2023)

Author(s):
Balram Sonwani, Sachin Kumar Jaiswal and Ankita Singh

Abstract:
Commenced from 6^th standard week (February second week) with an average population of 0.26 larvae/plant. The pod borer population increased and gradually reached its peak level of 6.32 larvae/plant at 13^th standard week (March last week) there after declined trend was observed as temperature increased. It was observed that the temperature between 25-35 ⁰C favoured the multiplication of gram pod borer. The percent population reduction of gram pod borer H. armigera on third, seventh and fouteenth days after spraying revealed that all treatments are superior over control. Among the treatments cypermethrin 10EC found superior over all the treatments followed by Ha-NPV and Bt after first and second sprays, respectively. Among the plant products neem oil found superior over other plant products. Highest reduction in larval population (79.29%) was observed with cypermethrin 10Ec @ 0.5 ml/lit. Minimum pod damage of 15.86%. and highest pod yield of 1720 Kg/ha was registered in cypermethrin. Highest cost benefit ratio was recorded in cypermethrin (1:2.70) followed by followed by Ha-NPV (1:1.83), Bt (costar WP) (1:1.46), Nimbicidine (1:1.29), pongamia leaf extract (1:1.27), Tobacco leaf extract (1:1.14) and NSKE (Neem seed kernal extract) (1:1.05).