随着农业耕作制度的演变,传统的手工收割小麦被联合收割机收获代替,小麦收割后直接免耕播种玉米,高麦茬和残留麦秸麦糠,再加上机械收割麦粒脱落,导致玉米苗期自生麦苗较多,使得玉米田苗前化除效果不佳,因此,越来越多的农民使用玉米苗后除草剂。根据近两年调查及基层实践,玉米苗后除草剂使用不当易产生药害,要采取创新使用 With the evolution of agricultural farming system, the traditional hand-harvested wheat was harvested by combine harvester, wheat was planted directly after no-till sowing of corn, high-stubble and residual wheat straw, together with mechanical harvesting of wheat grains, which led to maize seedling More self-generating wheat seedlings, making cornfield pre-emergence in addition to poor results, therefore, more and more farmers use corn seedling herbicides. According to the past two years of investigation and grass-roots practice, improper use of post-emergence herbicide in maize is easy to produce phytotoxicity, we should take innovative use