Author(s):

Sachin Kumar, Dharmpal Kerketta, Rajni D Agashe and Rajesh Chouksey

Abstract: Rice (Oryza sativa L.) is the leading cereal of the world (Juraimi et al., 2013), it feeds one third of the world population to whom it supplies almost two thirds of the food requirements. In India it is cultivated under various eco-systems, viz. transplanted, direct sown and rainfed situations. Weeds are the most important biological constraint to increasing yield. In rice, infestation of all types of monocot and dicot weed flora was observed. Hand weeding is most common practice to uproot weeds from rice field but scarcity and high wages of labour during make it uneconomic practice. Therefore, farmers need alternate weed management methodology and organic safer herbicides are one of the better substitutions of costly hand weeding. To overcome this problem On Farm Trial was conducted during 2015-16 & 2016-17 at different farmer’s field of Surguja District in transplanted rice with four treatments. The treatments included Post emergence application of Bispyribac sodium 10% SC 25 g ha-1 at 15-20 DAT, Post emergence application of Azimsulfuron 50% DF 35 g ha-1 at 15-20 DAT, Unweeded Control and Weed Free plot, replicated five times. Result revealed that application of Bispyribac Sodium 10% SC @ 25 g a.i. ha-1 gave significantly lowest weed density (16.8 &16.5), lowest weed dry weight g/m2 (2.4 &2.1), lowest weed compition index (6.84 &7.15), highest weed control efficiency (83 &86%) and recorded highest rice yield (42.20-42.80 q/ha) during both the year

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