Weed Dynamics And Production Potential Of Direct-Seeded Rice Cultivars As Influenced by Weed Control
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Department of Agronomy, Faculty of Agriculture, Annamalai University.
Online publication date: 2015-09-24
Publication date: 2015-09-24
Eurasian J Anal Chem 2015;10(3):195–202
The field study was undertaken during summer season of 2013 at Experimental Farm, Annamalai University to evaluate the rice cultivars and weed management effects on weeds growth and yield of direct-seeded rice (DSR) cultivars. The associated weed flora include Echinochloa colonum, Echinochloa crusgalli, Cynodon dactylon as grasses; Cyperus rotundus, Cyperus iria as sedges; Caesulia auxillaries and Eclipta alba as broadleaved weeds. Bispyribac-sodium + azimsulfuron (25 + 35 g/ha) + 0.25% NIS as post-emergence at 15-20 DAS was found to be most effective in minimizing weed density, biomass and in enhancing the weed control efficiency 40.9% and 38.0% during 2013 at 60 DAS. The maximum rice grain, straw and biological yield was found with application of bispyribac + azimsulfuron (25 g + 35 g/ha) + 0.25% NIS as post-emergence at 15-20 DAS and was significantly superior over rest of the treatments during cropping period.