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魔芋白绢病全年都能发生,为害普遍且严重.被害植株茎基初呈红褐色,逐渐软化,迅速扩大,使茎的接近地面处全圈腐烂,植株倒伏.被害部的表面缠绕白霉,随后生出褐色粟粒大的菌核,延至周围地表.本菌致病力强,侵染迅速,能使全坵魔芋死株断垅,甚至绝收.病原菌能形成菌核,酷暑时期间或生出担子孢子.菌核表面呈浓茶褐色,平滑,球形或半球形,0.8～2.3毫米,内部呈白色.担子孢子为无色
Azolla sclerotishia disease can occur throughout the year, the damage is common and serious.The victim plant stem base early reddish brown, and gradually softened, rapidly expanding, so that the stem near the ground full circle decay, plant lodging. , Then give birth to large brown miliary sclerotia, extended to the surrounding surface.The strong pathogenicity of the bacteria, rapid infection, can make the whole mound of konjac dead strains broken, or even absolute.Plasma can form sclerotia, during the summer or give birth to a burden Spores. Sclerotium surface was dark brown, smooth, spherical or hemispherical, 0.8 ~ 2.3 mm, white inside.