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玉米是我国主要粮食作物之一。同时,玉米还是动物饲料及重要工业原料来源,其在农业经济上的地位举足轻重。玉米对生长环境的要求不苛刻,在我国种植面积很广。近年来,推行的保护性耕作、玉米秸秆还田、大型机械跨区异地作业等,在获得了经济效益与环境效益的同时,也出现了一些问题,如保护性耕作的免耕播种,保护了土传病虫害的病原菌和地下害虫的栖息地;秸秆还田把病株残体和秸秆内越冬的害虫又带回大田,增加和积累了田间病原菌和害虫
Corn is one of the main food crops in our country. At the same time, corn is also a source of animal feed and an important source of industrial raw materials, and its status in the agriculture economy is of the utmost importance. The requirements for the growth environment of maize are not harsh, and the planting area in China is very wide. In recent years, the implementation of conservation tillage, corn stalks return to the field, large-scale machinery cross-regional operations, etc., in access to economic and environmental benefits, but also some problems, such as conservation tillage no-tillage sowing, protection Soil-borne diseases and pests and habitats of underground pests; straw to the residual plant disease and stalk overwintering pests back to the field, increasing and accumulation of field pathogens and pests