Abstract:
This study intended to find out the efficacy of insecticides on Brinjal
Shoot and Fruit Borer (BSFB) and the effects of them on natural enemies
in the brinjal field. Based on the questionnaire survey, five insecticides
those were highly used by farmers were selected for this study. These five
insecticides and an untreated control treatment were tested in the field by
arranging them with seven replicates in a completely randomized design.
Laboratory study was conducted to test the efficacy of insecticides on
the larva of the BSFB. The presence of natural enemies were monitored
in the field, two one day before and after the application of insecticide.
Analysis was done by using SAS and compared with Duncan’s Multiple
Range Test.
Acetamiprid was effective in the laboratory study and Chlorpyrifos
was found to be most applicable in the field. Ladybird beetles were most
abundant and long lasting predators in the brinjal fields. Spiders and ants
were having predatory activities in the field next to Ladybird beetles. The
effect of Carbofuran on the predators of brinjal pests was very minimal. On the other hand, the activities of natural enemies were poor in the
treatments of Chlorpyrifos and Acetamiprid while Carbofuran was least
effective in the control of brinjal pests.
