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zhouyu42

新虫 (初入文坛)

[求助] 内渗法,内渗计

关于内渗法和内渗计的基本介绍
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lqhhuihua

至尊木虫 (著名写手)

【答案】应助回帖

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感谢参与,应助指数 +1
见证2011: , 欢迎常来! 2012-04-17 13:07:18
zhouyu42: 金币+5, ★有帮助 2012-04-18 02:33:51
有些药剂仅能渗透作物表皮而不能在作物体内传导,药剂从叶表面渗进叶片内能杀死叶背面的蚜虫。因药剂不能从这片叶输送到另一片叶中去,对没有着药的这片叶子上害虫就没有效果,药剂的这种作用叫做内渗作用
每天进步一点......
2楼2012-04-16 22:42:15
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