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除草剂打完几个小时下雨没事
更新时间： 2020-11-19 00:00:00  

理论上来说是15天，但实践证明，用后马上下雨，效果最好。但15天之内下雨，还会产生效，只是效果没有马上下雨明显。除草剂喷施时应选择在高温、干燥、无风、晴朗天气，上午10点至下午4点为宜。实验表明，在风速超过8-10米/秒的条件下喷雾除草剂，除草剂的效可降低5%左右。在施后6小时遇雨，会降低效，应适当补喷。

关键词： 除草剂 小时 下雨 没事

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