INTENSITY OF INFESTATION AND MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER (Leucinodes orbonalis Guenee) IN KHARIF SEASON

Abstract

An experiment was conducted at the Sher-e-Bangla Agricultural University (SAU), Dhaka, during January to July, 2005 to observe the infestation level and to evaluate the effectiveness of different management practices against brinjal shoot &fruit borer, Luc inodes orbonalis Guenee Seven treatments comprising mechanical & cultural control with different combinations of three promising insecticides eg, Sumialpha 5EC, Suntap 50WP and Furdan 5G were tested on a local brinjal variety “Khat khatia” laid out in RCBD with 3 replications Highest infestation of shoot (17%) & fruit (63% by wt & 75% by no ) was observed in the control plot, which was significantly highest from all other treatments. Treatment 6 consisting of mechanical & cultural control + Suntap 50WP @ 1 g/1 & Sumialpha 5EC @ I ml/1 of water at 5% infestation level gave the best performance resulting significantly lowest shoot (6%) & fruit (25%) infestation confirming highest yield (20 96 ton/ha). Treatment 3 -Furadan 5G @ 1.5 kg ai/ha single application + Sumialpha 5EC @ lml/1 of water at 7 days intervals also gave statistically similar results. The intensity of fruit infestation by BSFB was higher at later stages of crop growth for all the treatments