10%乙草胺·苄嘧磺隆WP防除水稻抛秧田杂草效果

Effects of Wettable Powder Mixed with Acetochlor and Bensulfuron-Methyl for Control of Weeds in Seedling-Throwing Transplanted Rice Fields

通过田间试验研究10%乙草胺.苄嘧磺隆WP对水稻抛秧田杂草的控制效果和对水稻产量的影响,为水稻抛秧田草害的化学防控提供依据。试验结果表明,10%乙草胺.苄嘧磺隆WP对水稻抛秧田的稗草[Echinochloa crusgalli(L.)Beauv]、鸭舌草[Monochoria vaginalis(Burm.F.)]、异型莎草(Cyperus dif-formis L.)均有良好的防治效果,用量为60～120 g(a.i)/hm2的10%乙草胺.苄嘧磺隆WP对杂草的综合鲜重防效和综合密度防效分别为86.64%～99.08%、89.88%～99.44%,优于对照药剂50%乙草胺EC和10%苄嘧磺隆WP。10%乙草胺.苄嘧磺隆WP增产效果优于对照药剂,在水稻抛秧田具有良好的推广前景。

To provide guidance for chemical weed management in seedling-throwing transplanted rice fields, trials were conducted to evaluate the effects on weed control and crop yield of a fertilizer formulation mixed with acetochlor and bensul-furon-methyl. The results showed that 10% acetochlor and bensulfuron-methyl WP had good control effects on Echinochloa crusgalli （L.） Beauv, Monochoria vaginalis （Burm.F.）, Cyperus difformis L. in seedling-throwing transplanted rice fields. The overall fresh control effects and density control effects are 86.64%-99.08% and 89.88%~99.44% at 60-120 g （a.i）/hm2, and significantly higher than 50% acetochlor EC and 10% bensulfuron-methyl WP. The application of 10% aeetochlor and ben- sulfuron-methyl WP significantly increased the yield of rice which was better than those control herbicides. It has good appli- cation prospects in seedling-throwing transplanted rice fields.