EFFECT OF BOTANICALS ON OKRA (Abelmoschus esculentus L.) ATTACKING INSECT PEST

Abstract

The experiment was conducted in the field of Sher-e-Bangla Agricultural University, Dhaka during the period from mid April to August 2017 to find out the efficacy of different management against different okra pest. The treatments comprised four botanical products. These treatments are T 1 =untreated control ,T 2 = Spraying of Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 3 = Spraying of 10ml garlic oil@ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 4 = Spraying of 10ml black seed oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T 5 = Spraying of turmeric powder @ 200g/L of water at 7 days interval. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. The data were recorded on fruit and plant infestation by number, weight and length of individual fruit at early, mid and late fruiting stages; and yield related attributes as well as yield of okra. Spraying of Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval reduced highest aphid infestation at both vegetative (51.1%) and fruiting stages (54.1%). Highest reduction of plant infestation was (80.4%), highest shoot and fruit borer infestation reduction at different fruiting stage was (61.1%), highest jassid infestation at both vegetative and fruiting stages reduction was (47.2%) and (49.2%) respectively, highest white fly infestation at both vegetative and fruiting stages were (59.6%) and (59.8%) respectively. On the other hand it increased length of individual healthy fruit (16%), weight of individual healthy fruit (26.8%), and final yield of okra (41.2%). Considering Benefit Cost Ratio (BCR) and environment aspect, it may be suggested that neem oil may be suitable option than other control.