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通过田间试验研究50%四唑草胺·苄嘧磺隆WP对直播稻田杂草的控制效果和对水稻产量的影响,为直播稻田草害的化学防控提供依据。试验结果表明,每公顷使用50%四唑草胺·苄嘧磺隆WP有效成分112.5～187.5 g对直播稻田的稗草[Echinochloa crusgalli(L.)Beauv]、鸭舌草[Monochoria vaginalis(Burm.F.)]等均具有良好的防治效果,综合鲜重防效达到90%以上,优于对照药剂50%拜田净WP和10%苄嘧磺隆WP。施用50%四唑草胺·苄嘧磺隆WP能有效降低杂草对田间氮、磷、钾和水分的吸收,改善田间光照和水肥条件,水稻增产效果明显。
Field experiments were conducted to study the effects of 50% Tetralazoline and Bensulfuron-methyl WP on the weed control in direct-seeded rice fields and their effects on the yield of rice, providing the basis for the chemical control of direct weed damage in paddy fields. The results showed that 50% Tetraethoxam Bensulfuron-methyl WP per hectare was 112.5-187.5 g for the Echinochloa crusgalli (L.) Beauv and Monochoria vaginalis (Burm. F.) and so on, all had good control effect. The comprehensive fresh weight control efficiency reached more than 90%, which was better than that of the control drug 50% of Weta net WP and 10% of bensulfuron-methyl WP. The application of 50% Tetraethyl oxalate and bensulfuron-methyl WP can effectively reduce the uptake of nitrogen, phosphorus, potassium and water by weeds in the field, improve field illumination and water and fertilizer conditions, and increase the yield of rice.