Green Global
Foundation   Journal
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IMPACTS OF INTEGRATED WEED MANAGEMENT IN TRANSPLANT AMAN RICE (Pages : 45 - 53)

Transplant aman rice suffers from weed infestation which contributes to lower yield of this crop. A field experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from July to December 2002 to find out the best approach of weed management and an effective and economical weed control treatment through integrated approach on transplant aman rice cv. BRRI dhan37. The experiment was laid out in a randomized complete block design with four replications. There were fifteen treatments namely, No weeding, One hand weeding, Two hand weeding, Ronstar @ 2.0 1 ha-1 , Argold @ 0.75 1 ha-1 , M-chlor @ 13 kg ha-1 , Ronstar @ 2.0 1 ha-1 + 1 hand weeding, Argold @ 0.75 1 ha-1 + 1 hand weeding, M-chlor @ 13 kg ha-1 + 1 hand weeding, Ronstar @ 2.0 1 ha-1 + 1 weeding with Japanese rice weeder, Argold @ 0 . 7 5 l ha-1 + 1 weeding with Japanese rice weeder, M-chlor @ 13 kg ha-1 + 1 weeding with Japanese rice weeder, 1 hand weeding + 1 weeding with Japanese rice weeder, 2 hand weeding + 1 weeding with Japanese rice weeder, and Weed free. The effect of weed control treatments on the weed density, and weed dry weight was significant. Weed control treatments had significant effect on all the studied crop characters except 1000grain weight. The highest grain and straw yields were produced in the weed free treatment which was followed by Ronstar @ 2.0 1 ha-1 + 1 hand weeding, 2 hand weeding + 1 weeding with Japanese rice weeder and Argold @ 0 . 7 5 l ha-1 + 1 hand weeding. The lowest grain and straw yields were produced in the No weeding treatment which was followed by others. However the cost benefit analysis showed a bit different trend than that of grain and straw yields where the maximum profit was noticed in Argold @ 0.75 1 ha-1 + 1 weeding with Japanese rice weeder which was followed by Argold @ 0 . 7 5 1 ha -1 + 1 hand weeding. M-chlor @ 13 kg ha-1 + 1 weeding with Japanese rice weeder and Ronstar @ 2.0 1 ha-1Download