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The field experiment was conducted during kharif season of the year 2013-2014 on red lateritic soil of the Education-cum-experimental Farm, Department of Agronomy, College of Agriculture, Dapoli, Ratnagiri (M.S.) to study Effect of herbicides combinations for control of complex weed flora in direct seeded Rice (Oryza sativa). There have 10 treatments combination, Bispyribac-Na @ 25g/ha, Pendimethalin fb bispyribac-Na @ 1000 fb 25 g/ha, Oxadiargyl fb bispyribac-Na @ 100/25 g/ha, Pyrazosulfuron fb bispyribac -Na @ 20/25 g/ha, Pendimethalin fb bispyribac-Na fb manual weeding @ 1000 fb 25 g/ha, Pendimethalin fb manual weeding (Pendistar) @ 1000g/ha, Bispyribac -Na + (chlorimuron + metsulfuron) @ 20+4g/ha, Three mechanical weedings (cono / rotary weeder), Weed free check (HW at 20,40, and 60 DAS) and Weedy check. The present study revealed that as compared to weedy check all the weed control measures significantly reduced the weed density of monocots at 60 DAS during individual years and in pooled results. Application of pedimethalin fb manual weeding remained at par with weed free check and Pendimethalin fb Bispyriback-Nafb manual weeding and recording significantly lowest weed density of monocots over all other treatments during the year and various weed control measures tried significantly influenced the yield attributes viz. plant height and weight of filled grains per panicle over weedy check. Weed free check (three hand weeding) recorded significantly higher plant height over other treatments except Pendimethalin fb Bispyriback-Na fb manual weeding, Pendimethalin fb manual weeding, Three mechanical weeding and Pendimethalin fb Bispyriback-Nawhich were at par with weed free check. In respect of filled grains per panicle pre-emergence application of pendimethalin fb manual weeding significantly showed higher response over Bispyriback-Na, Oxadiargyl fb Bispyriback-Na andweedy check and remain at par with rest of the treatments in 2013 & 2014.
Key words: Direct seeded Rice, Different herbicides, weed density, yield attributing characters and chemical composition.