Comparative Efficacy and Economics of Certain Chemicals and Biopesticides against Podborer, Helicoverpa armigera (Hubner) in Chickpea at Naini, Prayagraj, India

Abstract

An experiment was conducted at the research plot of the Department of Agricultural Entomology at Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during the rabi season of 2021.The field was laid in randomised block design (RBD) with seven treatments and one controlled plot. The Mean larval population plant was taken day before and 3, 7 and 14 days after each spray. All the insecticides tested significally reduced the pest infestation compared to control. The results obtained based on pest population, grain yield and B: C ratio are as follows, T4 Spinosad 45% SC is most effective treatment against gram pod borer of Mean larval population producing maximum yield and recorded highest Cost-Benefit ratio compared to other treatments. While T1 Chlorantraniliprole 18.5% sc, T2 Spinetoram 11.7EC, T3 Flubendamide 39.35% SC, T4 Spinosad 45% SC,T5 Bacillus thuringiensis has shown average results has proved to be least effective chemicals. T6 Beauveria bassiana and T7 Metarhizium anisopilae found to be least effective in managing Helicoverpa armigera. When cost benefit ratio was worked out, interesting result was achieved. Among the treatment studied, the best and most economical treatment was Spinosad 45% SC (1:3.98), Spinetoram 11.7EC (1:3.95), followed by Chlorantraniliprole 18.5% sc (1:3.82), Flubendamide 39.35% SC (1:3.73), Bacillus thuringiensis (1:3.21), and Beauveria bassiana (1:2.96), The lowest cost benefit ratio was recorded in Metarhiziun anisopilae (1:2.80) when compared to Control (1:1.95).