BIORATIONAL MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER Leucinodes orbonalis (LEPIDOPTERA: PYRALIDAE)

Abstract

Brinjal is one of the most important vegetables but frequently attacked by brinjal shoot and fruit borer (BSFB) the major constraint of production. The experiment was conducted during October 2023 to April 2024 in the experimental field of the Department of Entomology, Hajee Mohammad Danesh Science and Technology University, Dinajpur. Potency of four bio-rational insecticides as Cyproflanilide, Azadirachtin, Spinosad and were tested against BSFB in RCBD with three replications. Among the treatments, significantly the highest (71.00) number of healthy shoots were found from the Spinosad treated plots while the lowest (43.00) from the untreated control plots. The lowest (7.67) number of infested shoots were recorded from the Spinosad treated plots but the highest (21.67) were found from the untreated control treatment. Spinosad (T3) treated plots showed the highest reduction (70.94%) of shoot over the untreated control. Similarly, the highest (52.33) number of healthy fruits were found from the Spinosad treated plants while the lowest (19.33) from the untreated control. The lowest number of infested fruits (8.67) were found from the Spinosad treated plants and provided the highest reduction (71.64%) of infested fruits over the untreated control. Spinosad yielded the highest weight of healthy fruits (4.90 kg/plot), but the untreated control had the lowest (2.00 kg/plot). Similarly, Spinosad treated plants had the lowest (0.66 kg/plot) weight of infested fruits, but untreated control exhibited the highest (2.60kg/plot) infested fruits. Therefore, Spinosad (Tracer-45 SC) could be used in protecting the brinjal from BSFB attack conserving bio-safety and food security.