[目的]研究三苯基乙酸锡对水稻田间水绵的防除效果.[方法]2008～2009年分别采用不同剂量的25%三苯基乙酸锡WP进行水绵防除试验,分别于施药后10、20、30 d调查药效,比较不同处理的防除效果.[结果]25%三苯基乙酸锡WP对水稻安全,对水稻田间水绵的防除效果持久且稳定;施药后30 d,对水绵的防除效果仍保持在98.00%以上,各处理的防除效果均优于对照药剂96%硫酸酮晶体.[结论]25%三苯基乙酸锡WP对水稻田水绵的防除效果明显,推荐剂量以300～450g/hm<'2>为宜.%[ Objective ] The aim was to study the prevention and control effect of Spirogyra communis in paddy fields by triphenyltin acetate.[ Method ] S. communis prevention and control experiments were conducted in 2008 and 2009 by applying different dose of 25％ triphenyltin acetate WP,and then the effects of different treatments were inspected and compared 10,20 and 30 d after application. [ Result] 25％ triphenyltin acetate WP had lasting and stable effect in guaranteeing the rice safety and preventing and controlling S. communis. And the prevention and control effect of S. communis still maintained above 98.00％ even at the 30th day after triphenyltin acetate application,whose effect was better than the that of the control herbicide of 96％ copper sulfate crystals. [ Conclusion] 25％ triphenyltin acetate WP could effectively prevent and control S.communis, and the recommended dose is 300 -450 g/hm2.
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