There are many types of pesticides , but according to their different classifications, the categories are different. The first pesticides in China are known. According to the amount of pesticides (LD50), the toxicity of pesticides can be divided into the following five levels:
1. Highly toxic pesticides. The median lethal dose is 1 to 50 mg/kg body weight. Such as monocrotophos, phosphorus amine, methamidophos, Suhua 203, 3911, etc.;
2. Highly toxic pesticides. The median lethal dose is 51 to 100 mg/kg body weight. Such as carbofuran, fluoroacetamide, cyanide, 401, zinc phosphide, aluminum phosphide, arsenic, etc.;
3. Poisoned pesticides. The median lethal dose is 101 to 500 mg/kg body weight. Such as Dimethoate, Ye Yu San, Kuweiwei, Dixon, 402, pyrethroid pesticides;
4. Low toxicity pesticides. The median lethal dose is 501 to 5000 mg/kg body weight. Such as trichlorfon, insecticidal double, malathion, phoxim, acephate, metformin, butachlor, glyphosate, thiophanate, trifluralin, bentazon, atla Jin et al;
5. Microtoxic pesticides. The median lethal dose is 5000 mg/kg/kg body weight. Such as carbendazim, chlorothalonil, ethyl aluminum phosphate, zinc, zinc, sterilized Dan, simazine and so on.
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