Comparative efficacy of biopesticides and certain chemicals against shoot and fruit borer (Earias vittella) on okra [Abelmoschus esculentus (L.)]
Author(s): Kanwate Bhushan Nilkanth and Usha Yadhav
Abstract: A field trail was conducted at the Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Naini, Prayagraj during Kharif season 2023. The trail was laid out in Randomized Block Desion with three replications, Eight treatments were evaluated against Earias vittella viz., T1 NSKE 5% + Spinosad 45% SC @ 5 ml/lit + 0.4 ml/lit, T2 Azadirachtin 1500 PPM @ 5 ml/lit, T3 Metarhizium anisopliae 1×108 (CFU/gm) @ 4 gm/lit, T4 Beauveria bassiana 2×109 (CFU/gm) @ 2 ml/ lit, T5 Emamactin benzoate 5% SG@ 0.3 ml/lit, T6 Chlorantraniliprole 18.5% SC @ 0.5 ml/lit, T7 Imidacloprid 17.80SL @ 0.3 ml/lit, T8 Untreated control. Result revealed that, among the all treatments (T6) Chlorantraniliprole 18.5% SC (12.52), proved to be the most effective treatment and least effective (T4) Beauveria bassiana 2×109 (CFU/gm) (18.85). Among all the treatments, the cost benefit ratio has been analyzed, in which the highest was Chlorantraniliprole 18.5% SC (1:5.7) and marketable yield (155 q/ha) followed by Emamectin benzoate 5% SC (1:5.5 and 143 q/ha), NSKE 5% + Spinosad 45% SC (1:3.6 and 128 q/ha), Imidacloprid 17.80% SL (1:4.5 and 118 q/ha), Metarhizium anisopliae 1×108 (CFU/gm) (1:3.9 and 103 q/ha), Azadiractin 1500 PPM (1:3 and 80 q/ha) and Beauveria bassiana 2×109 (CFU/gm) (1:2.7 and 72 q/ha) as compared to Untreated control (1:1.4).
