Effects of Controlling Weed in Rice Field with 32% Mefenacet·Bensulfurou-mthyl Acetochlor

[Objective] The study aimed to explore the effective and safe using techniques for new high efficient herbicides.[Method] The effect experiment of many kinds of herbicides on controlling weed in rice field along the Yangtze River region was conducted.[Result] 32% mefenacet·Bensulfurou-mthyl acetochlor WP was the complex agent of mefenacet,bensulfuron-methyl and acetochlor.It was safer than acetochlor,cheaper than 53% mefenacef bensulfuron methyl and was a broad spectrum herbicide with long effect time,convenient application and safe to rice.[Conclusion] After the rice transplanting,the control effects of broadcasting 32% mefenacet·Bensulfurou-mthyl acetochlor WP 750～900 ?g/hm2 mixed with toxic soil or urea on the main weeds of Barnyard grass,Leptochloa chinensis,Ammamiamultiflora and Rice galingale were steady over 85%,with safety to rice.