Effect of weed management practices on weed control efficiency, productivity and economics of transplanted rice ( Oryza sativa )

An OFT (on farm trial) was conducted on KVK, Vaishali, Dr. RPCAU, Pusa, Samstipur in two consecutive kharif seasons of years 2015 and 2016 on selected five farmers’ field with 6 treatments to find out the effect of different weed management practices to control complex weed flora in rice (Oryza stiva L) crop. Mean data of two years experimentation indicated that the application of various weed management practices significantly increased yield attributes viz. no. of panicles/ square meter, no. of grains/ panicle and 1000- grain weight. Yield and monetary income of rice crop were significantly influenced by application of weed management practices. Among all treatments, application of bispyribac- sodium @ 25 g ai/ha resulted in higher no. of panicles/ square meter (221.0), the maximum grain yield (4.05 t/ha), net return (40812 Rs/ha) and B:C ratio (1.58) which was superior to rest of the treatments. The highest weed control efficiency was recorded with bispyribac- sodium closely followed by two hand weeding (20 & 40 DAT). Two year study indicates that the application of bispyribac- sodium 25 g ai/ha was the best for higher yield and net returns from rice.