ECO-FRIENDLY MANAGEMENT OF INSECT PEST OF Bt BRINJAL FOR ENSURING YIELD AND QUALITY SEED PRODUCTION

Abstract

The experiment was conducted at the central farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh to evaluate the eco-friendly management of insect pest of bt brinjal for ensuring quality yield during the period from October, 2020 to April 2021. BARI Bt Begun-1 was used as the test crop and the experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Seven treatments, viz. Treatment T (Spraying Bio-neem plus botanical insecticide @ 0.5 ml/L at the 7 days intervals); T (Larval parasitoid + Bamper 20SL (Imidacloprid) @ 0.5 ml/L at the 7 days intervals); T (Field sanitation + Sex pheromone traps + Bamper 20SL@ 0.5 ml/L at the 7 days intervals); T

(Actara 25WG @ 0.3gm/L at the 15 days intervals); T (Larval parasitoid + Yellow sticky board traps); T 6 ii 5 (Field sanitation + Yellow sticky board traps) and T (untreated control) were included in this study. In case of different treatments performance, T 7 (Field sanitation + Sex pheromone traps + Bamper 20SL @ 0.5 ml/L at the 7 days intervals) showed the best results in terms of incidence of brinjal shoot and fruit borer, number of Jassid, Aphid, Epilachna beetle and Whitefly plant -1 3 , yield of healthy fruit and infested fruit, yield contributing characters and yield (t/ha) of bt brinjal. In term of total yield, the highest yield of brinjal (53.08 t/ha) was observed in T treatment which was closely similar with others treatment except untreated control. There was negative relationship present in number of brinjal shoot and fruit borer, jassid, Aphid, Epilachna beetle, Whitefly and fruit infestation in weight basis with the yield of bt brinjal, i.e. when the number of brinjal shoot and fruit borer and percentage of fruit infestation in weight basis was increased the yield of bt brinjal was decreased. From the study, it may be concluded that treatment T 3 (Field sanitation + Sex pheromone traps + Bamper 20SL @ 0.5 ml/L at the 7 days intervals) was more efficacy of different treatment for the eco-friendly management of insect pest of bt brinjal for ensuring quality yield which was followed by spraying of T 2 3 (Larval parasitoid + Bamper 20SL @ 0.5 ml/L at the 7 days intervals).