Management of brinjal shoot and fruit borer (Leucinodes orbonalis Guenee) using biorational insecticide based IPM packages

Abstract

Brinjal shoot and fruit borer (BSFB) is a serious pest of brinjal which can cause up to 90% yield loss and very difficult to control. An experiment was conducted in the Entomology Field Laboratory, Bangladesh Agricultural University during December 2017 to April 2018 on the management of brin- jal shoot and fruit borer using selected biorational insecticide based IPM Packages viz. spinosad + removal of infested shoot and fruit, abamectin + removal of infested shoot and fruit, emamectin benzoate + removal of infested shoot and fruit, cypermethrin + removal of infested shoot and fruit, spinosad + abamectin, spinosad + emamectin benzoate, spinosad + bupro- fezin, abamectin + buprofezin, emamectin benzoate + buprofezin, abamectin + emamectin benzoate along with an untreated control. The experiment was laid out in Randomized Complete Block Design with three replications. The effectiveness of IPM packages was evaluated based on following parameters viz. percent shoot and fruit infestation, percent protection of shoot and fruit over control, marketable and infested fruit yield (t ha−1), percent increase or decrease of marketable or infested fruit over control. All the IPM packages significantly reduced percent shoot and fruit infestation and significantly increased/decreased the marketable/infested fruit yield, respectively over untreated control at 7 days after spraying (DAS). Among the packages the best results were found in case of spinosad + removal of infested shoot and fruit (73.13% and 72.72% shoot and fruit protection, respectively over control; marketable fruit yield of 5.70 t ha⁻¹ and 65.07% reduction of infested fruit yield) and emamectin benzoate + buprofezin (82.72% and 57.70% shoot and fruit protection, respectively over control; marketable fruit yield of 5.71 t ha⁻¹ and 43.88% reduction of infested fruit yield) treated plots whereas the lowest protection was obtained from abamectin + buprofezin (15.67% and 20.70% shoot and fruit protection, respectively over control; marketable fruit yield of 2.87 t ha⁻¹ and 13.43% reduction of infested fruit yield). Therefore, spinosad + removal of infested shoot and fruit and emamectin benzoate + buprofezin could be recommended as the IPM programme for the sustainable management of BSFB.