江苏省直播稻田杂草的发生规律与综合防除技术研究

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江苏省水稻直播田杂草约有22科35属41种和1变种,稗草等15种为优势种群,杂草群落中各种群的组成及其比率随地区、时间及耕作栽培制度的变化而变化。杂草于水稻播种后3-4d开始出土,第10-20d达到出土高峰,第25-40d又出现一个较小的出草高峰。禾本科杂草出土较早,莎草和部分阔叶草出土最迟。直播稻田杂草的综合防除要贯彻“化学防治为主,农业措施为辅”的原则,化除的关键是“一除二封三杀四补”。新野(丁·恶)、扫葬特、速除(异丙·丁·苄)、杀草丹、千金、二氯·苄对直播稻
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