Efficacy of Selected Insecticides Against Tomato Fruit Borer, Helicoverpa armigera (Hubner) in Tomato

The present investigation was conducted during rabi season of 2023-2024 at Central Research field, SHUATS, Naini, Prayagraj using Randomized Block Design (RBD) method in three replications and 8 treatments. The treatments used were Indoxacarb 14.5 %SC, Chlorantraniliprole 18.5% SC, Emamectin benzoate 5% SG, Spinosad, Beauveria bassiana 1.15 WP, NSKE 5% and Fipronil 5% SC, and untreated control. Each Insecticide was sprayed twice at 15 days interval. The pest count per 5 plant was taken 1 day before spray and 3rd, 7th and 14th days after spray. The lowest larval population was recorded in the plot treated with Chlorantraniliprole 18.5% SC 2.67 and 1.86 after 1st and 2nd spray followed by Spinosad 2.90 and 2.21, Indoxacarb 14.5 %SC 2.97 and 2.41, Emamectin benzoate 5% SG 3.20 and 2.66, Fipronil 5% SC 3.60 and 2.90, Beauveria bassiana 1.15 WP 3.68 and 3.17, NSKE 5% 3.97 and 3.45 was found to be least effective than all other treatments. Among the treatment studied the best and most economical treatment was Chlorantraniliprole 18.5 SC with highest yield and cost benefit ratio of (232 q/h) and (1:8.52) followed by Spinosad 45 % SC %SC ( 228 q/h), (1:7.83), Indoxacarb 14.5 %SC ( 205 q/h) and (1:7.71), Emamectin benzoate 5% SG (195 q/h), (1:7.30), Fipronil 5% SC ( 187 q/h) , (1:7.08), Beauveria bassiana 1.15 WP (180 q/h), (1:6.75), NSKE 5% (150 q/h ),(1:5.57) as compared to control (100 q/h) and (1:3.97).