玉米是主要的粮食作物之一,种植面积大、分布范围广。危害夏玉米的杂草多为一年生,如自生麦、马唐、狗尾草、蟋蟀草等单子叶杂草及反枝苋、马齿苋、龙葵、青麻、田旋花等阔叶杂草,盛夏尤以禾本科杂草为主。近年来,使用化学农药防除杂草技术得到了普遍推广, Corn is one of the main food crops with a large acreage and a wide distribution. Endangered summer maize weeds are mostly annuals, such as self-growing wheat, Crabgrass, Setaria, cricket grass and other monocotyledonous weeds and Amaranthus retroflexus, purslane, solanum, green flax, In summer, especially grass weeds. In recent years, the use of chemical pesticides to control weeds has been widely promoted,