目前玉米田化学除草大多采用播后南前或苗期土壤封闭的办法，对防治玉米田前期杂草起到了积极作用。但由于施药时正值三夏大忙季节，加之施药期短，且受除草剂品种、整地质量、土壤水分和杂草叶龄的影响较大而限制了使用面积。我市玉米多为麦定套种或麦后直插，近几年随着麦收 At present, chemical weeding in corn field mostly uses the method of soil sealing before sowing or in seedling stage, which plays a positive role in preventing and controlling weeds in corn field. However, due to the busy summer season of three summer spraying, combined with a short period of application, and by the herbicide varieties, soil preparation quality, soil moisture and weed leaf age greater impact and limited use of the area. Most of the city maize Maoming interplanting or wheat after the line, in recent years with the wheat harvest