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除草剂确实好,它灭草及时,节省劳力,还有抑制病虫害的作用,是改进传统的耕作方法,提高劳动生产率,增加单位面积产量,实现农业现代化的重要措施之一。近年来,人们在农田及果园大面积施用化学除草剂,已取得显著的经济效益和社会效益。但是,在使用除草剂时必须准确掌握浓度、剂量和施药时期,否则,会给农作物造成药害,严重时颗粒无收,应引起重视。 一、药害的症状 所谓药害,就是不能正确地使用除草剂而引起农作物生长不正常,甚至造成死亡的现象,具体的
Herbicide is indeed good, it is timely, labor-saving, labor-saving and pest control. It is one of the important measures to improve traditional farming methods, increase labor productivity, increase yield per unit area and realize agricultural modernization. In recent years, large-scale application of chemical herbicides to farmland and orchards has yielded remarkable economic and social benefits. However, when using herbicides, the concentration, dosage and application period must be accurately grasped. Otherwise, the crops will be harmed and harmed. In severe cases, the crops should not be collected and should be taken seriously. First, the symptoms of phytotoxicity The so-called phytotoxicity, that is, can not correctly use herbicides caused by crop growth is not normal, and even cause death phenomenon, the specific