Studies the Effect of Some Bio-rational Insecticides on Chickpea Crop against Gram Pod Borer Helicoverpa armigera (Hubner)

Abstract

The investigation was conducted during Rabi, 2023- 2024 at the Agricultural Research farm, R.B.S. College Bichpuri, Agra. The major insect pest recorded was gram pod borer was recorded. Studies on HaNPV+Bacillus thuringiensis (1.11 larvae/five plant) Shown the highest level of efficacy among the treatment followed by HaNPV (1.56 larvae/ five plant), Beauveria bassiana (3.00 larvae/ five plant), Bacillus thuringiensis (2.33 larvae/ five plant), NSKE@ 5% (2.78 larvae/ five plant), Beauveria bassiana+ HaNPV+ Neem oil (1.44 larvae/ five plant), Beauveria bassiana+ NSKE+ Bacillus thuringiensis (1.67 larvae/ five plant), and control (6.67 larvae/ five plant). The lowest overall mean larval population was recorded in treatment Beauveria bassiana followed by NSKE. Results on percent pod damage reveals that among the all treatments, the lowest percent pod damage was recorded in HaNPV+ Bacillus thuringiensis (11.27%). While highest percent pod damage was recorded in treatment Beauveria bassiana (17.29%). Results on yield (q/ha.) shows that the highest yield of 16.00q/ha was observed from the plot treated with HaNPV+ Bacillus thuringiensis. Whereas, the lowest yield among the treatment was observed with the spray application of Beauveria bassiana (11.67 q/ha.).