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世界农化网中文网报道： 美国环保署根据毒性数据，采用五级或三级毒性分类标准对农药进行分类，分别针对陆生和水生生物，将其生态毒性按以下标准归入不同类别：
1 陆生-鸟类：5级分类
Toxicity Category | Avian: Acute Oral Concentration (mg/kg-bw) | Avian: Dietary Concentration (mg/kg-diet) |
very highly toxic | ＜10 | ＜50 |
highly toxic | 10～50 | 50～500 |
moderately toxic | 51～500 | 501～1000 |
slightly toxic | 501～2,000 | 1,001～5,000 |
practically nontoxic | ＞2,000 | ＞5,000 |
2 陆生-野生哺乳类：5级分类
Toxicity Category | Wild Mammals: Acute Oral Concentration(mg/kg bw) |
very highly toxic | ＜10 |
highly toxic | 10～50 |
moderately toxic | 51～500 |
slightly toxic | 501～2000 |
practically nontoxic | ＞2,000 |
3 陆生-非靶标昆虫：3级分类
Toxicity Category | Non-Target Insects: Acute Concentration(µg/bee) |
very highly toxic | |
highly toxic | ＜2 |
moderately toxic | 2～11 |
slightly toxic | |
practically nontoxic | ＞11 |
4 水生：5级分类
Toxicity Category | Aquatic Organisms: Acute Concentration(mg/L) |
very highly toxic | ＜0.1 |
highly toxic | 0.1～1 |
moderately toxic | ＞1～10 |
slightly toxic | ＞10～100 |
practically nontoxic | ＞100 |
信息来源：美国EPA官网
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