随着农业生产的需要和化学工业的发展,农药产量和使用范围不断扩大。目前世界农药的实际生产和使用的品种估计有五百多种,大量使用的有一百多种,年产量为一百八十到二百万吨,主要是有机氯、有机磷、有机汞、有机砷和氨基甲酸脂五大类。尽管化学农药存在不少问題,但十多年来,产量和用量的增长仍比较快。 With the needs of agricultural production and the development of the chemical industry, the output and use of pesticides have been expanding. At present, the actual production and use of pesticides in the world is estimated at more than 500 varieties, over 100 are widely used and the annual output is between 180 and 2 million tons. The main types of pesticides are organic chlorine, organic phosphorus, organic mercury, Organic arsenic and carbamate five categories. Although there are many problems with chemical pesticides, the output and consumption of rice have been growing rapidly for more than a decade.