EVALUATION OF SEX PHEROMONE AND CHEMICAL INSECTICIDES FOR CONTROLLING BRINJAL SHOOT AND FRUIT BORER (BSFB)

Abstract

A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to evaluate the efficacy of sex pheromone and chemical insecticides for controlling brinjal shoot and fruit borer (BSFB), cultivated during rabi season (October, 2020 to March, 2021). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T 1 Pheromone trap at canopy level; T 3 : Pheromone trap at upper canopy level; T 2 : Pheromone trap at lower canopy level; T 4 Marshal 20 EC (carbosalfan) at 7 days interval; T 5 Spraying of Marshal 20 EC (carbosalfan) at 7 days interval; T 6 : Spraying of : Pheromone trap at upper canopy level + + Spraying of Marshal 20 EC (carbosalfan) at 7 days interval; T 7 : Pheromone trap at canopy level canopy level + Spraying of Marshal 20 EC (carbosalfan) at 7 days interval; and T 8 : Pheromone trap at lower control. Pheromone trap setting at canopy level performed the best results to suppress BSFB compare then the other setting positions like upper and lower canopy level. Treatment T 6 contributed to reduce the percent shoot and fruit (by number and weight) infestation (7.99%, 3.83% and 12.22%, respectively) of brinjal and also obtained the highest weight of edible portion of infested fruits, fruit length, fruit girth, single fruit weight and yield (0.23 kg, 11.03 cm, 13.37 cm, 39.11 gm and 14.89 ton/ha, respectively). Therefore, it could be concluded that, the pheromone trap setting at canopy level with the spraying of Marshal 20EC (carbosalfan) at 7 days interval could be the best treatment for controlling brinjal shoot and fruit borer in brinjal field.