Evaluation of insecticides against foliage feeding beetles of potato

Abstract

A field experiment was conducted to evaluate the efficacy of insecticides against foliage feeding beetles viz., Henosepilachna vigintioctopunctata F. and potato flea beetle, Epitrix cucumeris on potato (Solanum tuberosum L.) during Rabi, 2019-20 and 2020-21 at Odisha University of Agriculture and technology (OUAT), Bhubaneswar, India. The treatments consisted of azadirachtin 0.03% w/w@1500ml/ha, cypermethrin 25% EC @200ml/ha, fipronil 5% SC@1000ml/ha, spinosad 45% SC @187.5ml/ha, cartap hydrochloride 50% SP @1000g/ha, chlorpyriphos 20% EC@2000ml/ha and untreated control. The results revealed that, cartap hydrochloride 50% SP @1000g/ha was found to be most effective against epilachna beetle (0.7beetles/plant) and flea beetle (0.8beetles/plant) with 85.41% and 82.98% reduction over control and also recorded maximum potato tuber yield (14.1t/ha) with 48.42% yield improvement over untreated control.