Integrated weed management in dry direct-seeded rainy season rice
DOI:
https://doi.org/10.59797/ija.v53i2.4844Keywords:
Direct-seeded rice, Grain yield, Integrated weed management, Weed floraAbstract
A field experiment was carried out during rainy season (kharit) of 2006 and 2007 at Pundibari, West Bengal to work out integrated weed management practices and their economics in dry direct-seeded rice. The weed flora emerged during experimentation were: grasses like Cynodon dactylon and Echinochloa colonurn; sedges like Cyperus rotundus, C. iria, and Firnbristylis rniliacea; and broad-leaved weeds like Ludwigia parviflora, Ageratum conyzoides, Spilanthes paniculata, Eclipta alba and Enhydra fluctuans. In integrated weed-management practices, butachlor @ 1.5 kglha as pre-plant surface application + brown manuring with Sesbania rostrata + 2,4-D @ 0.50 kglha recorded the highest grain yield (3.00-3.88 tlha), which was significantly on a par with that obtained from season-long weed-free situation (3.14-3.98 tlha). The highest net returns (Rs11,889 and 19,029lha) and benefit : cost ratio (0.74 and 1.1 9) were also recorded in this treatment. Therefore, this integrated weed management prac- tice could become effective in dry-direct seeded kharif rice under foothill (terar) agro-climatic region of West Ben- gal.References
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