Evaluation of biopesticides against major insect pests on mustard (Brassica juncea L.)

Abstract

Investigations on seasonal incidence of major insect-pests on mustard (Brassica juncea L.) “(Brassica juncea L.)” were conducted at research farm of Department of Entomology, V.N.M.K.V., Parbhani during Rabi 2022-23. The treatment Thiamethoxam 25%WG showed to be best control over mustard aphids which was statistically at par with Gir Sawaj Lecanicillium lecanii1.15% WP, 60 g and Beauveria bassiana 40 g., for mustard sawfly Thiamethoxam 25%WG also showed to be best control over mustard sawfly which was statistically at par with Beauveria bassiana 40 g, and Gir Sawaj Lecanicillium lecanii 1.15% WP, 60 g. Thiamethoxam 25% WG treated plots yielded higher (16 q h-1) Gir Sawaj Lecanicillium lecanii 1.15% WP0.0035% treated plots yielded (14.9 qh-1), Beauveria bassiana (14.5 q h-1), Gir Sawaj Lecanicillium lecanii 1.15% WP, 0.09% (14 q ha-1), Azadirachtin 1500 ppm (13.8q ha-1), Lecanicillium lecanii 1.15% WP (Market produce) (13q ha-1), Gir Sawaj Lecanicillium lecanii 1.15% WP, 0.0035% (12.7 q ha-1), Metarhizium anisopliae (12.5 q ha-1),) and the untreated control was recorded (6.6 q ha-1) yield. When considering the economics of treatments, Thiamethoxam 25%WG (1:12.6) was recorded highest cost benefit ratio which was followed by Beauveria bassiana (1:10.8).