使用农药保护作物的最终目的是使作物增产的利润超过施用农药的成本。化学除草正是在农业生产上能获得很高经济效益的一种手段。而除草剂的使用量从某种程度上来讲反映着一个国家的经济、技术水平。如美国、英国、西德、日本等发达的资本主义国家的除草剂产量、销售量和使用量均比别的农药大,与全世界总的情况相适应。例如世界农 The ultimate goal of using pesticides to protect crops is to increase the profits of the crops more than the cost of pesticides. Chemical weeding is precisely a means of achieving high economic benefits in agricultural production. The use of herbicides, to a certain extent, reflects a country’s economic and technological level. Developed capitalist countries such as the United States, Britain, West Germany and Japan have greater production, sales and use of herbicides than other pesticides and adapt to the general situation in the world. For example, the world agriculture