Efficacy of novel insecticides and bio-pesticides for diamond back moth (Plutella xylostella) management in cabbage

Abstract

The experiment was carried out at the Instructional Farm of JNKVV-College of Agriculture, Rewa (M.P), during the Rabi season 2020-2021 on cabbage. The experiment was laid out in a Randomized Block Design with nine treatments, including Chlorantraniliprole 18.5 SC at 10 g a.i./ha, Fipronil 5% SC @ 40 g a.i./ha, Indoxacarb 14.5 SC @ 40 g a.i./ha, Spinosad 45 SC @ 100 g a.i./ha, Novaluron 10 EC @ 75 g a.i./ha, Emamectine benzoate 5 SG @ 10 g a.i./ha, Neem oil 0.15% @ 4.5 g a.i./ha , Bt 5% WP @ 25 g a.i./ha and untreated control and three replications against diamondback moth two sprays of insecticide were done at 15 and 35 days after transplanting of the crop. The effect of insecticide was recorded on 3, 7, 10 and 15 days after the insecticide. The mean population of DBM after two sprays showed that Spinosad 45 SC proved to be the most effective and superior treatment, recording the lowest population of DBM (0.55 larvae/plant). The order of efficacy of insecticides was found in order T4 (Spinosad 45 SC) > T1 (Chlorantraniliprole 18.5 SC) > T6 Emamectin benzoate > T3 (Indoxacarb 14.5 SC) >T2 (Fipronil 5% SC) > T5 (Novaluron 10 EC) >T8 (Bt 5% WP )> T7 (Neem oil 0.15%). The untreated control recorded a maximum DBM larval population (3.35 larvae/plant). Resulting in the head yield 320.00 q/ha Spinosad 45 SC @ 100 g a.i./ha with maximum C:B ratio (1:21.31) was recorded from Chlorantraniliprole 18.5 SC treatment followed by Indoxacarb 14.5 SC (1:18.20).