玉米田化学除草具有省时、省工、高效、增产等优点,深受农民欢迎。但是,除草剂不同于其它商品,比起除草效果除草剂药害更让人揪心,随着除草剂应用面积的逐年扩大,除草剂药害现象也常有发生,造成玉米减产,给农民带来经济损失。因此,正确掌握除草剂的使用方法,避免产生药害,对大力推广玉米田化学除草技术,提高玉米生产水平具有十分重要的意义。一、药害产生的原因玉米田除草方法有两种:一是播种后出苗前 Cornfield chemical weeding with time-saving, labor-saving, high efficiency, yield and other advantages, welcomed by farmers. However, unlike other products, herbicides are more worrying than the effects of weeding herbicides. As herbicides are applied more and more year after year, the phenomenon of herbicide phytotoxicity often occurs, resulting in the reduction of corn yield and bringing to farmers Economic losses. Therefore, to correctly grasp the use of herbicides to avoid injury, it is of great significance to vigorously promote the chemical weed-removing technology in corn field and improve the corn production level. First, the causes of phytoextraction There are two ways to weed corn field: First, after sowing before emergence