Managment of brinjal shoot and fruit borer (Leucinodes orbonalis Guenee) with integrated pest management package(s)

ABSTRACT: The study was conducted to evaluate the performance of different IPM packages for management of brinjal shoot and fruit borer (BSFB) (Leucinodes orbonalis Guenee) in brinjal field during September 2015- February 2016. The tested IPM packages were package 1: clipping off infested brinjal shoot and fruit (mechanical control) + NSKE; package 2: clipping off infested shoot and fruit + NSKE + Rambo 10 EC; package 3: clipping off infested shoot and fruit + NSKE + Rekhaphos 20 EC; package 4: clipping off infested shoot and fruit + NSKE + Kinalux 25 EC; package 5: clipping off infested shoot and fruit + NSKE + Abamectin 1.8 EC; and an untreated control. The rates of shoot infestation at pre-fruiting and fruiting stages among the treatments ranged from 04.34%-14.09% and 01.92%-08.79% and the results differed significantly. All the IPM packages showed significantly lower rates of infestation compared to control and the package 2 had the lowest rates of infestation. The lowest fruit infestation of 10.55% by number and 09.08% by weight was recorded from package 2. The rate of reduction of fruit infestation over control was 71.75, 53.39, 53.02, 47.51, and 41.69% by number and 70.09, 52.07, 55.58, 49.36 and 45.10% by weight in package 2, package 3, package 4, package 5 and package 1, respectively. The marketable yield in different packages ranged from 19.53 – 38.76 t ha-1. The highest adjusted net return and BCR of Tk. 520488.10 and 9.23, respectively were obtained from package 2 treated plots. The second highest BCR of 5.0 was calculated from package 3, which was followed by package 5 (4.94) and package 1 (3.15) treated plot. The lowest BCR of 3.12 was found in package 4. The IPM packages 2, 3 and 5 were effective to suppress BSFB attacking brinjal shoot & fruit.

Keywords: Leucinodes orbonalis, insecticides, clipping, neem.