Comparative efficacy and economics of certain insecticides against gram pod borer, Helicoverpa armigera (Hübner) in chickpea

Abstract

A field investigation was conducted to evaluate the comparative efficacy of certain insecticides against Helicoverpa armigera (Hübner) infesting chickpea at Agriculture Research Farm, Banaras Hindu University, Varanasi, U.P., during Rabi 2017-18. The results revealed that Chlorantiniprole 18.5 SC 92g a.i. ha-1 followed by Flubendamide 39.35 EC 49g a.i. ha-1 and Spinosad 45 SC 74g a.i. ha-1 were found most effective in reducing H. armigera population and pod damage. The highest yield was recorded in the treatment Chlorantiniprole 18.5 SC 92g a.i. ha-1 (17.33 q ha-1) followed by Flubendamide 39.35 EC 49g a.i.
ha-1 (16.44 q ha-1) and Spinosad 45 SC 74g a.i. ha-1 (15.55 q ha-1). The maximum yield increase over control was recorded in treatment Chlorantiniprole 18.5 SC 92g a.i. ha-1 (97.60%) and minimum in treatment Acephate 75 WP 750 g a.i. ha-1 (14.48%). The highest avoidable yield loss was recorded in Chlorantiniprole 18.5 SC 92g a.i. ha-1 (49.39%) and lowest avoidable yield losses were noticed in Acephate 75 WP 750 g a.i. ha-1 (12.64%). The highest benefit: cost ratio was observed in Indoxacarb 14.5 EC 36 g a.i. ha-1 (7.78:1)and lowest benefit: cost ratio was recorded from Chlorantiniprole 18.5 SC 92g a.i. ha-1 (1.19:1).