Efficacy of Biopesticides for the Management of Rice Yellow Stem Borer Scirpophaga incertulas (Walker) in Rice at Prayagraj, U.P, India

Abstract

The present experiment was conducted to highlight the Efficacy of biopesticides for the management of rice yellow stem borer [scirpophaga incertulas (Walker)] at prayagraj, U.P, India.  The eight treatments comprised of different insecticides and biopesticides. Metarhizium anisopliae (T1), Bacillus thuringiensis 1.15% (T2), Beauveria bassiana 1.15% (T3), Verticillium lecanii1.15% (T4), Neem oil 5% (T5), Eucalyptus oil5% (T6), Imidacloprid 17.8%SL (T7), one untreated Control (T8) were evaluated against rice stem borer. The different insecticides and biopesticides treatments revealed that the minimum dead hearts, were recorded in synthetic insecticides, Imidacloprid 17.8%SL followed by Beauveria bassiana 1.15%, Metarhizium anisopliae. The minimum dead heart percentages Imidacloprid 17.8%SL were observed in as compared to the natural dead heart of  per cent being noticed in untreated control. The percent of the dead heart infestation among the treatments are notices as Metarhizium anisopliae (T1)  Bacillus thuringiensis 1.15%WP (T2), Beauveria bassiana 1.15%WP (T3),  Verticillium lecanii1.15%WP (T4), Neem oil 5% (T5), Eucalyptus oil5% (T6), Imidacloprid 17.8%SL(T7), The yield and cost benefit ratio of the data revealed that the highest yield was recorded in the Imidacloprid 17.8%SL @46.66q/ha with highest Benefit-cost ratio of 1:3.47 followed by Bacillus thuringiensis 1.15% @ 38.33 q/ha with benefit cost ratio of 1:2:77 Beauveria bassiana 1.15% @ 43.33q/ha with benefit cost ratio of 1:3:27,  Verticillium lecanii 1.15%@ 36.66q/ha with benefit cost ratio of 1:2:73,  Neem oil 5% @ 33.33q/ha with benefit cost ratio of 1:2:46, Eucalyptus oil5%@ 31.66 q/ha with benefit cost ratio of 1:2:35, Metarhizium anisopliae @41.66q/ha with benefit cost ratio of 1:3:13. The chemicals shows better results in combating to the pest infestation compare to biopesticides and botanicals.