DEVELOPMENT OF ANIPM PACKAGE FOR COMBATING THE OKRA SHOOT AND FRUIT BORER ( EARIAS VITTELLA FAB.)IN OKRA

Abstract

A field experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Bangladesh during May 2011 to August 2011 to develop an IPM package for controlling Okra shoot and fruit borer in okra. The experiment was comprised with eight treatments including an untreated control and laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments were as follows T1 = Spraying of neem oil @ 4ml/L of water at 7 days interval; T2= Spraying of water based neem seed kernel extract @ 50g/L of water at 7 days interval; T3 = Spraying of water based neem leaf extract @ 200g/L of water at 7 days interval; T4 = Trichogramma evanescens egg parasitoid @ 0.5g/plotat 7 days interval; T5= Spraying of neem oil @ 4ml/L of water + T. evanescens egg parasitoid @ 0.25g/plot at 7 days interval; T6 = Spraying of water based neem seed kernel extract @ 50g/L of water + T. evanescens egg parasitoid @ 0.25g/plot at 7 days interval; T7= Spraying of water based neem leaf extract @ 200g/L of water + T. evanescens egg parasitoid @ 0.25g/plot at 7 days interval; T8 = Untreated control. It was observed that T5 treatment performed best results in reduction of shoot infestation (96.50 %), flower bud infestation (83.33 %), fruit infestation by number and weight (93.80 % and 86.90 % respectively) and infestation intensity (77.47 %) over control. The lowest number of larva per fruit (0.32) was recorded in T5 whereas, the highest number of larva per fruit (1.60) was recorded from untreated control. The yield contributing characters provided best performance in yield which found in T5 where yield was increased (99.37 %) over control and also gave maximum (6.46) Benefit Cost Ratio (BCR)in the same treatment.