ECO-FRIENDLY MANAGEMENT OF OKRA SHOOT AND FRUIT BORER USING BOTANICALS AND CHEMICAL

Abstract

An experiment was conducted in the farmer’s field at Rampal, under Munshiganj Sadar Upazila of Munsiganj, Bangladesh during the period from February’2014 to June’ 2014 to study the ecofriendly management of okra shoot and fruit borer (Earias vittella Fab.) using botanicals and chemical. The treatments are comprised with different botanical products, one synthetic chemical insecticide and one untreated control and these are T1 = Neem leaf extract @ 200g/Litre of water sprayed at 7 days interval; T2 = Neem seed karnel extract @200g/Litre of water at 7days interval; T3 = Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T4 = Dholkalmi leaf extract @200g/Litre of water at 7 days interval; T5 = Mahogany leaf extract @200g/Litre of water at 7 days interval; T6 = Suntap 50SP @ 1.5ml/ Litre of water at 7 days interval; T7 = Untreated control. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The data were recorded on shoot infestation; fruit infestation by number and weight at early, mid and late fruiting stages; plant and yield related attributes as well as yield of okra. Among all treatments T6 (Suntap 50SP) showed best performance against okra shoot and fruit borer and reduced the highest percent of shoot infestation, plant infestation, flower infestation and fruit infestation by number and weight in early, mid and late stages (85.26, 93.58, 100, 100, 100 percent) over control throughout the growing period of okra respectively. Among the different botanical products, Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval showed best performance in case of shoot infestation, fruit infestation by number and weight in early, mid and late stages, plant infestation and flower infestation. Also in case of yield, plots treated with T3 ( Neem oil @ 4 ml/Litre of water) gave highest products. On the other hand, Dholkalmi leaf extract @ 200g/Litre of water at 7 days interval showed lowest performance in case of shoot infestation, plant infestation and flower infestation and also the plots treated with this treatment showed lowest production of okra. It was revealed from the experiments, T6= Suntap 50SP @ 1.5ml/ Litre of water at 7 days interval showed best result and T7= Untreated Control showed least performance in case of shoot infestation, fruit infestation by number and weight in early, mid and late stages, plant infestation and flower infestation and Yield. Okra yield was increased due to increases of number of branches/plant, number of leaf/plant and plant height on the other hand fruit yield was decreased due to increase of fruit infestation by number and by weight occurs to okra shoot and fruit borer.