ECO-FRIENDLY INSECT-PEST MANAGEMENT OF OKRA

The experiment was conducted at the field laboratory of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh from mid April to August 2017 to find out the efficacy of different eco-friendly management practices against various okra pests. The treatments comprised of four botanical products. These treatments are T1 =untreated control ,T2 = Spraying of Neem oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T3 = Spraying of 10ml garlic oil@ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T4 = Spraying of 10ml black seed oil @ 4 ml/Litre of water mixed with 10ml of trix liquid sprayed at 7 days interval; T5 = 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 vegetative and 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 (51.10%) and fruiting stages (54.06%). Highest reduction of plant infestation was 80.45%, highest shoot and fruit borer infestation reduction at different fruiting stage was 61.10%, highest jassid infestation at both vegetative and fruiting stages reduction was 47.22% and 49.22% respectively, highest white fly infestation at both vegetative and fruiting stages were 59.64% and 59.85% respectively. On the other hand, it increased length of individual healthy fruit (16.03%), weight of individual healthy fruit (26.80%), and final yield of okra (41.25%). Considering Benefit Cost Ratio (BCR) and environmental aspect, it may be suggested that neem oil is the most suitable option than other control.