一、施药时间:玉米苗在不同生育时期耐药力不同,出苗前施药比出苗后施药安全,因为出苗前种子被土覆盖着,接触药剂的机会少,而出苗后施药,是把药液喷在幼苗上,就容易接触更多的药剂,对幼苗生长不利。所以,我们认为阿特拉津、阿乙台剂等除草剂,还是出苗前喷施好。二、土壤湿度:玉米由湿度较大既有利于杂草的萌发,又有利于药剂被杂草吸收传导,因此除草效果就好。所以,应在阴天或小雨后无风的天气施药。三、药剂选择:根据田间的杂草种类,选用对玉米安全,而杀草 First, the application time: Maize seedling resistance in different growth stages of different pre-emergence application than post-emergence application security, because the seed before emergence is covered by the soil, access to pharmaceutical opportunities less, and after the application of pesticides, is The liquid sprayed on the seedlings, it is easy to contact with more agents, adverse growth of seedlings. Therefore, we think that Atrazine, A-agent and other herbicides should be sprayed before emergence. Second, the soil moisture: Corn from the humidity is conducive to the larger weed germination, but also conducive to the absorption of chemicals weed conduction, so weeding effect is good. Therefore, the application should be cloudy or light windy weather. Third, the choice of agents: According to the field of weeds, corn on the choice of security, and kill grass