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有机汞制剂从三十年代开始引入,广泛地用于进行小粒禾谷类作物(尤其是小麦、大麦、燕麦和黑麦)的种子处理已四十多年了。象氰胍甲汞和西力生这样的药剂已在全世界大部分地区使用过。随着有机汞对动物(包括人)毒性认识的日益增长,许多国家农药管理机构已作出禁用的规定。1970年美国环保局作出禁止烷基汞在州际间运输、而库存货物则可继续使用的规定。当时,危险较小的苯基汞制剂,如醋酸苯汞铵仍被允许生产和使用。1978年美国也禁止苯基汞制剂在州际间运输,但再次规定现存货物可继续使用。这样,在七十年代的十年中,可以看到了禾谷类种子处理实践中的一个变迁:烷基汞和苯基汞制剂逐步被淘汰,种植者已转向采用其他种子处理剂。
Organic mercury preparations, introduced since the 1930s, have been widely used for the seed treatment of small grain cereals (especially wheat, barley, oats and rye) for more than 40 years. Pharmacy such as Cyanide A and Merrill Lynch have been used in most parts of the world. With the increasing awareness of the toxic effects of organic mercury on animals, including humans, many national pesticide regulatory agencies have already banned them. 1970 US Environmental Protection Agency to prohibit the transport of alkyl mercury in the interstate, while the inventory of goods can continue to use the provisions. At that time, less dangerous phenylmercury preparations, such as phenformin acetate, were still allowed to be produced and used. In 1978, the United States also banned the transport of phenylmercury preparations across the interstate, but again stipulated that the existing goods could be used continuously. Thus, during the decade of the 1970s one can see a shift in the practice of cereal seed treatment: the phasing out of alkyl mercury and phenylmercury preparations, and growers have turned to other seed treatment agents.