EFFECTIVENESS OF SOME IPM COMPONENTS FOR THE MANAGEMENT OF FRUIT FLY ON BITTER GOURD

Abstract

ectiveness of some 1PM components for the management of fruit fly on bitter gourd A held experiment was carried out at research field of Shcr-e-l3angla Agricultural University, Dhaka, to study the effectiveness of different 1PM components for the management of fruit fly infestation on bitter gourd in kharip season; 2006.The experiment was laid out in it Randomized Complete Block Design (RCBD) with four replications of each treatment. Seven components were used in the experiment. The treatment components used were Ti: Neem Leaves Extract 10%, T2 Hand picking of infested fruits, Tj: Bait trap with 0.5g of Dipterex 80sp with lOOg sweet gourd smash and 100m1 water, T 4: Garlic extract 5%, T : Neem leaves Extract 10% + 1-land picking of infested fruits, T 5: Bagging of fruits at 3 days after anthesis (DAA) and left for five days., T7: Untreated (control).The results indicated that higher production of fruits per plant (by number and weight), and higher healthy fruits (by number and weight) was obtained in the treatment T5 showing lowest percent of infested fruit (by number and weight). Accordingly the highest total numbers of fruits per plant (by number and weight) were also recorded in plants treated with •fc compared to other components. The overall highest percent fruit infestation (by number and weight) was obtained in treatment 17. The highest fruit yield (t hi') was recorded in T5 component and the lowest yield (t/ha) in control treatment (T7). The yields due to different treatment components ranked in the order of T5>1'1> i'o> 'l'4> T3> 12> T7.1n reproductive stages, the highest percent weight of edible portion of single infested fruit was recorded in plants treated with T5 compared to other treatments. The economic analysis demonstrated that the highest net benefit of Tk. 315300 hi' was obtained from treatment component T5, probably it was the effect of combined application of neem leaves extract 10% + hand picking of infested fruits, resulting lower fruit infestation, increase total yield and healthy yield. On the other [)and, 8CR analysis indicated that the use of neem leaves extract (10%) in the treatment component T, gave the higher 13CR value than the other components, this may be due to minimum management cost involve in this treatment.