Comparative Efficacy and Economics of Biopesticides with Emamectin Benzoate against Diamondback Moth, Plutella xylostella (L.) in Cabbage, Brassica oleracea var. Capitata (L.)

Abstract

A field trial was conducted during rabi season 2023-2024 at Central Research Farm (CRF), Sam Higginbottom University of Agriculture, Technology and Sciences, Naini, Prayagraj, Uttar Pradesh. The experiment was laid out in Randomised Block Design (RBD) with eight treatments each replicated thrice using a variety Green Soccer (546). The treatments viz., Emamectin benzoate 5% SG, Bacillus thuringiensis 5.0% WP, Spinosad 02.50 % SC, Verticillium lecanii 5.0% SC, Neem seed kernel extract 5%, Beauveria basssiana 1x 108CFU/ml, Azadirechtin 00.03 % WSP and along with an untreated control against plutella xylostella in cabbage.The data on larval population of Diamond back moth over control on first and second spray overall mean revealed that all treatments were significantly superior over control.Amomg all the treatments minimum larval population was recorded in in T3 Spinosad 02.50 %SC (1.045) followed by T1 Emamectin benzoate5%SG (1.212), T2Bacillus thuringiensis 5.0% WP (1.345),T6 Beauveria bassiana 1x 108 CFU/ml (1.512),T4 Verticillium lecanii 5.0 % SC (1.667),T5 Neem seed kernel extract 5 % (1.934),T7 Azadirechtin 00.03 % WSP (2.133).While, the highest yield (298q/ha) was obtained from the treatment T3 spinosad 02.50%SC as well as B:C ratio (1:5.76) was obtained high from this treatment. It followed by T1 Emamectin benzoate 5%SG (276q/ha) (1:5.53),T2 Bacillus thuringiensis 5.0% WP (269q/ha)(1:5.42),T6 Beauveria bassiana 1x 108CFU/ml (259q/ha) (1:5.24), T4 Verticillium lecanii 5.0% SC(249q/ha)(1:5.04), T5 Neem seed kernel extract 5% (233q/ha) (1:4.65), T7 Azadirechtin 00.03% WSP(215q/ha)(1:4.42) and the lowest yield and B:C ratio is recorded in T0 Control (186q/ha) (1:4.05).