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毒性问题 农药能防病灭虫,但有些农药对人畜亦有较大的毒性,在生产、运输、使用的过程中,如果处理不当,可能引起中毒事故。 当然,一般化学药物,都有不同程度的毒性,使用时都应该注意。有人(Bubois及Geiling)曾把化学药品的急性口服毒性,以致死中量(LD_(50))为标准,分为六类:(1)剧毒(1毫克/公斤以下),(2)高毒(1—50毫克/公斤),(3)中毒(50—500毫克/公斤),(4)稍毒(0.5—5克/公斤)(5)无毒(5—15克/公斤),(6)无害(15克/公斤以上)。作为农药而论,由
Toxicity Pesticides prevent diseases and pests, but some pesticides also have greater toxicity to humans and animals. In the process of production, transportation and use, improper handling may cause poisoning. Of course, the general chemical drugs, have different degrees of toxicity, should pay attention to when used. Some people (Bubois and Geiling) put the acute oral toxicity of chemicals, the median (LD_ (50)) as the standard, divided into six categories: (1) virulent (1 mg / kg), and (5-50 g / kg), (3) poisoning (50-500 mg / kg), (4) slight toxicity (0.5-5 g / kg) (6) Harmless (15 g / kg or more). As a pesticide, from