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一、马铃薯晚疫病1.主要症状:该病害是一种爆发性病害。水浸状,浅绿色晕,白色霉层,扩展后茎部或叶柄染病现褐色条斑,严重整株枯焦。2.传播途径和发病条件:病菌主要以菌丝体在薯块和土壤病残体中越冬。播种带菌薯块,导致不发芽或发芽后出土即死去,形成缺苗,有的出土后成为中心病株,病部产生孢子囊借气流传播进行再侵染,形成发病中心,致该病由点到面,迅速蔓延扩大。
First, the potato late blight 1. The main symptoms: The disease is an explosive disease. Flooding, light green halo, mildew layer, after expansion stem or petiole disease is brown streaks, serious whole plant coking. 2 routes of transmission and the incidence of conditions: bacteria mainly in the tubers and soil disease in winter. Seeds with potato sprouts, resulting in no germination or germination unearthed after death, the formation of lack of seed, and some unearthed as the center of diseased plants, the Ministry of disease caused by sporadic dissemination of airborne infection, the formation of the center of the disease caused by the point To the surface, rapid expansion and expansion.