FIELD EVALUATION OF PROMISING BIORATIONAL PESTICIDES AGAINST BRINJAL SHOOT AND FRUIT BORER, LEUCINODES ORBONALIS GUENEE

In the present study, efficacy of three bacterial fermented biopestcides viz., spinosad, emamectin bennzoate and abamectin and one insect growth regulator, buprofezin were evaluated against the infestation of brinjal shoot and fruit borer(BSFB), Leucinodes orbonalis (Guen) during January to July 2015. Biopesticides were applied either individually or in some selected combinations viz., buprofezin + emamectin benzoate, buprofezin + abamectin, buprofezin + spinosad and datawere collected on different parameters such as percent shoot infestation, percent fruit infestation and marketable fruit yield. It was found that all the treatments significantly reduced percent shoot (15.66-63.99% reduction) and fruit infestation (17.27-70.75% reduction) and increased marketable fruit yield over control (12.87-84.33% increase). The best result was found in case of combined treatment buprofezin + emamectin benzoate treated plots (70.75% shoot and 63.99% fruitprotection; highest marketable fruit yield of 9.94 t/ha) whereas the least protection was obtained from buprofezin (1 mL/L) treated plots (17.27% shoot and 15.66% fruit protection; lowest marketable fruit yield of 6.05 t/ha). The present studyrevealed that the selected biorational pesticides could be used both singly and in combination for the successful management of L. orbonalis.