Comparative efficacy of biopesticides and selected chemicals against shoot and fruit borer, Earias vittella (Fabricius) on okra [Abelmoschus esculentus (L.) Moench]

Abstract

This field trial, which is entitled “Comparative efficacy of biopesticides and selected chemicals against shoot and fruit borer [Earias vittella (Fabricius)] on okra [Abelmoschus esculentus (L.) Moench]” was carried out at the Central Research Farm of Sam Higginbottom Universty of Agriculture, Technology and Sciences, Prayagraj. The experimental trial was conducted during the Rabi season of 2020-21 in Randomized Block Design (RBD) on three replications, okra cultivar i.e. Super green. Two applications of eight treatments viz., T1 Neem oil (3 ml/L), T2 Spinosad 45% SC (0.5 ml/L), T3 Sixer plus (1.5 ml/L), T4 Metarhizium anisopliae 1.0% WP (1×10⁸ CFU/gm) (5 gm/L), T5 Chlorantraniliprole 18.5% SC (0.3 ml/L), T6 Cypermethrin 25% EC (2 ml/L), T7 Beauveria bassiana 1.0% WP (1×10⁹ CFU/gm) (5 gm/L) and T0 Control (Untreated). Among all the treatments minimum Percent shoot infestation, Percent fruit infestation, and Cost-benefit ratio were observed in T5 Chlorantraniliprole 18.5% SC with (5.43%, 4.64% and 1:3.86) which was followed by T2 Spinosad 45% SC (9.49%, 6.34 and 1:3.24), T6 Cypermethrin 25% EC (10.86%, 8.72% and 1:2.90), T3 Sixer plus (13.13%, 11.29% and 1:2.54), T7 Beauveria bassiana 1.0% WP (14.56%, 13.82% and 1:2.00), T1 Neem oil (17.20%, 15.63% and 1:1.89), T4 Metarhizium anisopliae 1.0% WP (18.47%, 17.38% and 1:1.65) and T0 Control (Untreated) (22.19%, 26.99% and 1:1.53) respectively.