我县早稻秧田连作面积一般都在60%以上,有的连作长达3—4年以上,又不注意秧板消毒,以致一些地方早稻秧田病害流行,损秧面积逐年扩大。目前,我地早稻秧常见病害主要有绵腐病和立枯病,该病病原菌都系弱寄生真菌,营腐生生活,在土壤及植物残体内越冬。一般育过早稻秧而又发病严重的秧田,土壤中 In our county, the area of ​​early rice seedling continuous cropping is more than 60%. Some of them are up to 3-4 years old and do not pay attention to the disinfection of the seedlings. As a result, the diseases of early rice seedling are prevailing in some places and the area of ​​damaged seedling is expanding year by year. At present, the common diseases of early rice seedlings in our country are cotton rot and blight. The pathogens of this disease are all weak parasitic fungi, living in saprophytic families and overwintering in soil and plant residues. General education early rice seedlings and severe onset of seedling, soil