1Scientific Officer, Agronomy Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh
2Senior Scientific Officer, Bangladesh Rice Research Institute, Regional Station – Bhanga, Faridpur, Bangladesh
3Senior Scientific Officer, Agronomy Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh
4Scientific Officer, Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh
Abstract: Wet direct-seeded rice (Oryza sativa L.) is an attractive alternative to transplanted rice, as it saves the drudgery of raising seedlings and transplanting, reducing labor and cost of cultivation. As direct-seeded rice stays in the field for a longer duration than transplanted rice so weed control remains one of the major challenges for its success. A field experiment was conducted at Bangladesh Rice Research Institute, Bangladesh during Boro season of 2013-14, to evaluate effectiveness of different weed management practices; weedy, hand weeding and other practices with pre and post-emergence herbicides; Bensulfuran methyl + Acetachlor and Pyrazosulfuran ethyl on the performance of direct-seeded rice. Results showed that yield and yield attributing parameters and weed dynamics were significantly affected and the trend of higher production and lower weed dynamic in different growing stage of direct-seeded rice was obtained. Irrespective of weed management options, hand weeding (5.21 t ha-1), pre with post emergence herbicide (5.15 t ha-1), post emergence herbicide with one supplement hand weeding (5.02 t ha-1) and pre emergence herbicide with one supplement hand weeding (4.95 t ha-1) produced significantly higher yield, while lowest yield was recorded in control plots (3.54 t ha-1).
Keywords: Direct seeding, weed management, hand weeding, weed density, rice.
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