Entomopathogenic Fungi and their Combination Against Jassid (Amrasca biguttula biguttula Ishida) on Bt Cotton Under Field Conditions in Maharashtra
Abstract
Seven entomopathogenic fungi and their combination treatments along with dimethoate as a standard check were evaluated against Amrasca biguttula biguttula Ishida on cotton at Rahuri, Dist-Ahmednagarduring kharif 2014–15. Among the entomopathogenic fungi and their combinations, the combination treatment with Verticillium lecanii 1.15% WP+ Metarhizium anisopliae 1.15% WP proved to be highly effective in controlling jassid population which was next to treatment with dimethoate 30 EC. However it was found statistically at par with Beauveria bassiana 1.15% WP+ Metarhizium anisopliae 1.15% WP + Verticillium lecanii 1.15% WP. Significantly the highest cotton yield (15.33 q/ha) was recorded with Verticillium lecanii 1.15%WP + Metarhizium anisopliae 1.15% WP. On the basis of ICBR, Metarhizium anisopliae 1.15% WP was found the most economical.
Keywords
Amrasca biguttula biguttula, Verticillium lecanii, Beauveria bassiana, Metarhizium anisopliae, Cotton
