Management of Rice Caseworm (Nymphula depunctalis) in Rice in Eastern Region of Uttar Pradesh, India

Abstract

The present investigationwas carried out at Heera Puri research field, Institute of Agriculture and Natural Sciences, Deen Dayal Upadhyaya Gorakhpur University, District Gorakhpur during Kharif, 2023. In the kharif season of 2023, there was a rice crop, the relative effectiveness of six insecticides viz. flubendiamide 39.35% SC, NSKE 5%, cartap hydrochloride 50% SP, spinosad 45 SC, neem oil 5%, and emamectin benzoate 5% SC with control was assessed in the field against the rice caseworm. Spinosad 45 SC (3.95 %) was found to be the most effective insecticide treatment among all pesticides for controlling the rice caseworm, as it has recorded the lowest infestation. The second-best treatment was emamectin benzoate 5% SC (4.07 %), followed by flubendiamide 39.35% SC (4.21%), cartap hydrochloride 50% SP (4.32%), Neem oil 5% (4.75%), and NSKE 5% (4.85%). The significantly higher grain yield was obtained in Spinosad 45 SC (55.94 q/ha) treated plots which are followed by emamectin benzoate 5% SC (54.19%), flubendiamide 39.35% SC (54.02 q/ha), cartap hydrochloride 50% SP (53.21 q/ha), neem oil 5% (52.36 q/ha) and NSKE 5% (51.27 q/ha). The economics of various treatments based on net profit and cost of plant protection revealed that the highest cost: benefit ratio Spinosad 45 SC (1:4.47) followed by Emamectin benzoate 5% SC (1:3.96), followed by Cartap hydrochloride 50% SP (1: 2.06), Neem oil 5% (1: 1.25), NSKE 5% (1: 1.23) and the lowest cost-benefit ratio was observed in Flubendiamide 39.35% SC (1: 0.88).