Comparative efficacy and economics of selected bio pesticides with Chlorantraniliprole against tomato fruit borer [Helicoverpa armigera (Hubner)] on tomato [Solanum lycopersicum L.]

Abstract The field trial was conducted at Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, UP during Rabi, 2022–2023. The experiment was laid out in RBD (Randomized Block Design). Eight treatments were evaluated against Helicoverpa armigera i.e., (T1) Chlorantraniliprole 18.5% SC (T2) ½Dose Chlorantraniliprole + Nisco sixer plus 2ml/lit (T3) Spinosad 45% SC (T4) Nisco sixer plus 2ml/lit (T5) Neem seed kernel extract 5% (T6) Azadirachtin 5% (T7) Beauvaria bassiana and (T0) untreated Control Were tested to compare the efficacy against Helicoverpa armigera and their influences on yield of Tomato. The best and most economical treatment T1 Chlorantraniliprole 18.5% SC (1:10.), followed by T2 ½Dose Chlorantraniliprole + Nisco sixer plus 2ml/lit (1:10.0) T3 Spinosad 45% SC (1:8.7), T4 Nisco sixer plus 2ml/lit (1:8.1), T5 Neem seed kernel extract 5% (1:6.9), T6 Azadirachtin 5% (1:6.5), T7 Beauvaria bassiana (1:5.8), T0 untreated control (1:4.9) having lowest B:C ratio. Chlorantraniliprole 18.5% SC, ½Dose Chlorantraniliprole + Nisco sixer plus 2ml/lit, Spinosad 45% SC, Nisco sixer plus 2ml/lit recorded the minimum fruit infestation by 8.57, 9.60, 10.66, 11.35 percent respectively. The highest yield was noticed in Chlorantraniliprole 18.5% SC (240.5 q/ha), followed by ½Dose Chlorantraniliprole + Nisco sixer plus 2ml/lit (232.5 q/ha) and Spinosad (200 q/ha).