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玉米大斑病是玉米的重要病害之一．在制种田自交系的生长季节，田间地麦和玉米秸垛中残留的病叶组织中的菌丝体．恢复活动后新产生的分生孢子及越冬的分生孢子、厚壁孢子随雨水飞溅或气流传播到玉米时片上。在适宜的温湿条件下。便可发芽侵入，引起发病。在感病自交系上侵入后
Corn blight is one of the important diseases of corn. During the growing season of inbred inbred lines, the mycelium in the diseased leaves remained in the field and corn stalks. New conidia and overwintering conidia recovered from the event, thick-walled spores with rainwater or air currents propagating onto corn. In the appropriate temperature and humidity conditions. Germination can be invasive, causing disease. After invaded susceptible inbred lines