棉花苗期病害是棉花生长前期重要的复合性病害,包括棉苗红腐病、棉苗炭疽病和棉苗立枯病,前两种病害病原菌附着在棉种短绒上,依靠种子进行传播,棉苗立枯病则靠菌核在土壤中或病残体中过冬,在适宜的温度及湿度下,往往引起棉花苗期病害大面积发生,造成 Cotton seedling disease is an important pre-cotton complex disease, including cotton seedlings red rot, cotton seedlings anthracnose and cotton seedling blight, the first two diseases attached to the cotton seed short fiber, relying on the seeds for transmission, Cotton seedling blight rely on the sclerotia in the soil or sick in winter, under the appropriate temperature and humidity, often cause large-scale cotton seedling disease occurred, resulting in