Evaluation the efficacy of bio pesticides against gram pod borer Helicoverpa armigera (Hubner) on chickpea (Cicer arietinum L.)

Abstract

Evaluation of six insecticides viz., Azadiractin1% (1000ppm) Neem oil, Baeuveria bassiana 1% WP, Bacillus thuriengiensis var kurstaki 5% WP, Metarhizium anisopliae 1.0% WP, Verticillium lecanii 1.15% WP and Ha NPV 250 LE were evaluated against Gram Pod Borer (Helicoverpa armigera Hubner) larvae. The Gram Pod Borer (GPB) larval population was counted on 5 randomly selected plants at 24 hr. before spray and at 3, 7 and 10 days after spray. The two-years experiment was conducted during Rabi 2018-19 and 2019-20 at the Rehti Farm of school of Agriculture, Mhow, experimental field of Department of Entomology, BRAUSS, (MP). All the biopesticides significantly reduced the GPB larval population. The Pooled GPB population varied from 2.30 to 2. 50 larvae/plant during Rabi season one day prior tothe first spray. The population was significantly lower with Bacillus thuriengiensis var kurstaki 5% WP, followed by Ha NPV 250 LE, Baeuveria bassiana 1% WP, Metarhizium anisopliae 1.0% WP and Azadiractina 1% (1000ppm) Neem oil, these five biopesticides are showing best management effects on the GPB larvae and pod damaging per cent and remain, and least effective treatment was Verticillium lecanii 1.15% WP. The maximum reduction of larval population and pod damaging per cent. In Rabi season, the highest chickpea grain yield was obtained with Bacillus thuriengiensis var kurstaki at 5% WP.