Field efficacy of selected insecticides and botanicals against chilli thrips, Scirtothrips dorsalis (Hood) under field conditions
Author(s): Rushab Raut and Ashwani kumar
Abstract: The present investigation was conducted at the research plot of the Department of Agricultural Entomology at Central Research Farm (CRF), Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj during the Kharif season of 2023-24. The experiment was conducted in Randomized Block Design (RBD) with three replications eight treatments, were evaluated against Scirtothrips dorsalis ie, (T1) Spinosad 45% SC 0.3 ml/ha, (T2) Diafenthiuron 47.8% SC 1 ml/lit, (T3) Azardirachtin 1% 3 ml/l, (T4) Nisco sixer plus 2 ml/lit, (T5) Imidacloprid 17.8% SC 1 ml/lit, (T6) Abamectin 2 ml/ha, (T7) Fipronil 5% SC 1 ml/ha, untreated control (T0) were evaluated against chilli thrips (Scirtothrips dorsalis). Among the insecticides evaluated, (T5) Imidacloprid (0.47) proved to be most effective treatments followed by Spinosad 45% SC 0.3 ml/ha (0.68), Abamectin 0.9 ml/ha, (0.76), Fipronil 5% SC 2 ml/ha (1.25), Diafenthiuron 47.8% SC 1 ml/lit (1.53), Nisco sixer plus 2 ml/lit (1.84) and Azardirachtin 1% 3 ml/lt (2.26). The plots treated with T5 Imidacloprid showed highest yield (130 q/ha) followed by Spinosad (125 q/ha), Abamectin (110 q/ha), Fipronil (100 q/ha), Diafenthiuron 47.8% SC (75 q/ha) as compared to control T0 (45 q/ha). When cost benefit ratio worked out, interesting result was achieved, among the treatment studied, the best and most economical treatment Imidacloprid 17.8 SL (1:10.65) followed by Spinosad 45% SC (1:10.35), Abamectin (1:9.02), Fipronil (1:8.19), Diafenthiuron 47.8% SC (1:7.45). Nisco sixer plus (1:7.01), Azardirachtin 1% (1:6.13) as compared to control to (1:3.40).
