Comparative Efficacy and Economics of Chemicals Insecticides and Bioagents against Diamondback Moth (Plutella xylostella) on Cabbage (Brassica oleracea var. Capitata L.)

Field trial was conducted during rabi season 2021-2022 at Central Research Farm (CRF), SHUATS. The experiment was laid out in Randomised Block Design with eight treatments each replicated thrice using a variety Green Soccer (546). The treatments are were Chlorantraniliprole 18.5% SC -T1, Indoxacarb 14.5%SC-T2, Emamectin benzoate 5% SG-T3, Spinosad 45% SC-T4, Beaveria bassaina (1x108CFU/ml)-T5, Metarhizium anisopilae (1x108 CFU/ml)-T6, Bacillus thuringiensis (1x108CFU/ml)-T7 and untreated control -T8. Mean reduction in the larval population per plant revealed that all the treatments were significantly superior over the control (6.51). Chlorantraniliprole 18.5% SC recorded lowest mean larval population of P xylostella (1.52), followed by Spinosad 45% SC (1.75),Indoxacarb 14.SC (2.00), Emamectin Benzoate 5% SG (2.28), B thuringiensis (2.68), B bassiana (2.87), M anisopilae (3.02). Highest yield (280 q/ha) as well as B:C ratio (1:6.37) was obtained from the treatment Chlorantraniliprole 18.5% SC followed by Indoxacarb 14.5 SC (1:6.33), Emamectin Benzoate 5%SG (1:6.25), B thuringiensis (1:5.97), Spinosad 45% SC (1:5.75), B bassiana (1:5.72), M anisopilae (1:5.50) as compared to control (1:3.34).