有机磷农药种类及知识要点

　　目前市面上经常见到的农药如甲拌磷、敌百虫、乐果等，基本上都为有机磷农药，那么有机磷农药又是如何划分的呢?按照毒性程度的划分通常可分为三类：

　　剧毒类

　　甲拌磷、内吸磷、对硫磷、保棉丰、氧化乐果等

　　高毒类

　　甲基对硫磷、二甲硫吸磷、敌敌畏、亚胺磷等

　　低毒类

　　敌百虫、乐果、氯硫磷、乙基稻丰散等

　　有机磷农药小知识点：

　　有机磷农药大多在碱性溶液中易分解而失去毒力;仅易溶于水，与，变成毒力更强的敌敌畏。

　　等经氧化后，毒力增强。

　　1、敌百虫易溶于水，与碱性溶液接触后，毒性甚至在敌敌畏之上。

　　2、二溴磷遇还原物质如金属、含硫氢化物很快失去溴，形成毒力更大的敌敌畏。

　　3、氧化后毒性变得更强的农药：内吸磷(1059)、对硫磷(1605)、甲拌磷(3911)、马拉硫磷(4049)、乐果。

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