近年来,玉米粗缩病在有的地区呈上升趋势,特别是2011年在山东省较大面积发生,涉及品种达几十个,有的品种减产幅度很大,有的甚至绝收。而玉米又是我国最主要的粮饲作物,每年全国玉米的播种面积约为3300万hm2,玉米粗缩病是玉米的重要病害,对玉米生产构成严重威胁。 In recent years, maize sliver has been on the rise in some areas, especially in a large area in Shandong Province in 2011, involving dozens of varieties, and some varieties have been greatly reduced in yield, and some even declined. Corn is also the most important grain-fed crop in China. The annual sown area of ​​corn in China is about 33 million hm2. Maize sliver is an important disease of maize and poses a serious threat to the production of corn.