Shreyas Patil, Ganesh Bansode, Santosh More, Sunil Lohate and Charudatta Chaudhari
Abstract
An investigation was carried out on efficacy of insecticides against shoot borer, Leucinodes orbonalis Guenee on potato crop at the experimental plot of All India Co-ordinated Research Project on Potato, ZARS, Ganeshkhind, Pune (Maharashtra) in Kharif 2022. The results revealed that chlorantraniliprole 18.5% SC @ 0.4 ml/l proved to be the most effective insecticide amongst all with mean shoot infestation of 13.15 per cent and reduction of 46.22 per cent in shoot infestation over the untreated control. It was on par with emamectin benzoate 5% SG @ 0.4 ml/l and spinosad 45% SC @ 0.3 ml/l recorded 40.37 and 40.00 per cent reductions in infestation over the control, respectively. The next best treatments were indoxacarb 14.5% SC @ 1 ml/l, profenophos 50% EC @ 2 ml/l and chlorpyrifos 50%+ cypermethrin 5% EC @ 2 ml/l. The untreated control had the highest degree of shoot infestation (24.45%). The treatment with the highest incremental cost-benefit ratio (I.C.B.R.) was chlorantraniliprole 18.5% SC (1:7.51). However, chlorpyrifos 50% +cypermethrin 5% EC (1:2.40) had the lowest incremental cost-benefit ratio.