Effects of Wettable Powder Mixed with Butachlor and Pyrazosulfuron for Control of Weeds in Transplanted Rice Fields

To provide guidance for chemical weed management in broadcasted rice fields,trials were conducted to evaluate the effects on weed control and crop yield of a fertilizer formulation mixed with 28% butachlor and pyrazosulfuron WP.The results showed that 28% butachlor and pyrazosulfuron WP 226.8~525.0 g(a.i)/hm2 had good control effects on Echinochloa crusgalli(L.) Beauv,Monochoria vaginalis(Burm.F.),Rotala indica,Cyperus difformis L.in transplanted rice fields.The overall fresh control effects and density control effects were significantly higher than 60% butachlor EC and 10% pyrazosulfuron WP.The application of 28% butachlor + pyrazosulfuron WP significantly reduced the weeds absorption of nutrition and water,resulting in prominent yield enhancing.