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化学农药主要是指用来保护农、林、牧业和农、林产品免受病、虫、杂草、鼠类为害的药剂及调节植物生长的药剂。 一、杀虫剂 害虫给农业生产带来了巨大的损失。几千年来,蝗虫一直是我国农业的大敌,自公元前707年有蝗灾记载至1949年,先后发生800多次蝗灾。1953年起用飞机撒药灭蝗,从此在我国历史上消灭了蝗灾。由于普遍使用杀虫剂,已使我国粮、棉因虫害造成的损失都压低
Chemical pesticides are mainly used to protect agricultural, forestry, animal husbandry, and agricultural and forestry products from diseases, insects, weeds, and rodents as well as to regulate the growth of plants. 1. Insecticides Pests have caused huge losses in agricultural production. For thousands of years, locusts have been the enemy of China’s agriculture. Since 707 BC, there have been locust records in 1949, and more than 800 locust disasters have occurred. Since 1953, it has used airplanes to disperse medicine and has wiped out locusts. Since then, it has wiped out plagues in the history of our country. Due to the widespread use of pesticides, the losses caused by grain and cotton due to insect pests in China have been reduced.