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期 刊 ：植物保护学报 1999年

关键词：烟嘧黄隆；助剂；杂草叶龄；除草剂；药效；

Keywords:surfactants, Digitaria sanguinalis, nicosulfuron, weed size, raining,

摘 要 ：室内盆栽试验表明，烟嘧黄隆的药效受要草叶龄、助主施药与降不间隔时间的影响。从玉米田马唐防除的生态经济阈值和不同叶龄防产的综合结果看，以马唐３叶期后至５叶期前喷３６ｇ／ｈｍ＾２ 嘧黄隆效果最好。非离子型表面活性剂吐温２０、ＯＰ－１０、平平加１５和阴离子型表面活性剂洗衣粉都能显著提高烟嘧黄隆对马唐的防效，增效幅度在２８．６－５２．７％。渗透剂Ｔ和ＹＺ－９０１不能显著提高烟嘧黄隆的药效。施药后与降水的间

Abstract:Experiments conducted in greenhouse showed that the efficacy of nicosul-furon on crabgrass was affected by weed size, surfactants and rain interval. Results indicated that crabgrass control decreased dramatically at 7-leaf stage. According to the eco - ec

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