Bio-efficacy of post-emergence herbicides for control of complex weed flora in drum-seeded rice (Oryza sativa)
2016
Tripathy, S.K. | Mohapatra, S. | Mohanty, A.K.
A field experiment was conducted during the rainy season of 2012 and 2013 at Gambharipali, Bargarh Odisha, to study the bio-efficacy of various herbicides on weeds, yield and economics of drum-seeded rice (Oryza sativa L.). Sole application of chlorimuron ethyl + metsulfuron methyl @ 4 g/ha, ethoxysulfuron @ 18 g/ha and 2, 4-D ethyl ester @ 400 g/ha showed selectivity towards broad-leaf weeds, whereas fenoxaprop-p-ethyl @ 60 g/ha showed selectivity towards grasses. Tank-mix application of chlorimuron ethyl + metsulfuron methyl with fenoxaprop-p-ethyl (4+60 g/ha) proved to be the most effective in minimizing the density (10.57/m²), biomass (4.07 g/m²) of weeds and enhancing the weed-control efficiency (95.7%), grain yield (5.68 t/ha), N, P and K uptake by crop, net returns (30, 439/ha) and benefit: cost ratio (0.61).
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