COMPARATIVE STUDY FOR THE MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER AND EPILACHNA BEETLE WITH BOTANICALS AND SOME SELECTED CHEMICAL INSECTICIDES

Abstract

A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effective as well as hazards free management practice(s) of brinjal, cultivated during Rabi season (November, 2017 to March, 2018). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T 1 comprised of spraying of neem oil @ 3 ml neem oil and 10 ml trix mixed with 1 liter of water @ 7 days interval; T 2 comprised of spraying of neem seed kernel extract @

5.0 ml/L of water at 7 days interval; T 3 comprised of spraying of bioneem plus @ 3.0 ml/L of water at 7 days interval; T 4 comprised of spraying of Marshal 25 EC@ 3.0 ml/L of water at 7 days interval; T 5 comprised of spraying of Ripcord 20 EC @ 1.0 ml/L of water at 7 days interval; T 6 comprised of spraying of Imitaf 20 SL @ 0.1 ml/L of water at 7 days interval; T 7 comprised of spraying of Actara 25 WG @ 0.2 gm/L of water at 7 days interval; T 8 comprised of untreated control. Treatment T 7 contributed to reduce the highest number of brinjal shoot and fruit borer (2.17 brinjal shoot and fruit borer/plant), number of bore (1.12 bores/five fruits), number of infested shoot (2.08 infested shoot/five plants), number of infested fruits caused by BSFB (1.39 fruit/plant), percent fruit infestation at early fruiting stage (4.93%), mid fruiting stage (10.00%) and late fruiting stage (13.84%) in number and early fruiting stage (19.52%), mid fruiting stage (16.11%) and late fruiting stage (15.31%) in weight, number of epilachna beetle (1.14 epilachna beetle/plant), percent leaf and plant infestation by epilachna beetle (9.20%) and (8.33%), percent of edible portion of infested fruit (90.49%), single fruit weight (39.00 gm) and yield (35.36 ton/ha). T 1 also contribute to reduce the incidence of infestation by considering the above mentioned parameters. The yield found in the T 1 treated plots was 28.58 ton/ha. Considering the environmental hazard and effect of incidence of beneficial arthropods T 1 was the best treatment against brinjal shoot and fruit borer and epilachna beetle of brinjal.