连续3a对不同来源的玉米种子,利用显微镜镜检和试种观察植株发病显症的方法,检测其携带玉米疯顶病病菌状况。结果表明,病株病穗籽粒、病株健穗籽粒、病田健株籽粒都有较高的带菌率。因此,病菌随种子调运远距离传播是造成各地病害突发的主要原因。 The maize seeds from different origins were continuously collected for 3 years. Microscopic examination and trial planting were used to observe the pathogenesis of maize. The results showed that the diseased ear grains, sick ear and healthy ear grains, healthy seedlings have a higher strain rate. Therefore, the pathogen spread with the seeds of long-distance transmission is caused by the main reason for the sudden onset of disease around.