“白毛菌病”是近年来东北地区木耳栽培中一种常见病害。其病原菌在盛夏伏天侵染木耳子实体,在木耳耳片腹面生长一层白色网状霉层,对木耳生长及商品形态造成严重危害。从黑龙江省尚志地区染病耳片上分离得到两株病原菌,经对它们进行形态学特征观察、rDNA ITS序列分析和致病性测定,证明这两株病菌为尖孢镰孢和厚垣镰孢,二者均对栽培木耳具有致病性。 “White hairy disease ” is a common disease of fungus cultivation in Northeast China in recent years. Its pathogens invade in midsummer days fungus fruiting body, in the fungus ear ventral growth of a layer of white fungus layer, fungus growth and commodity morphology caused serious harm. Two strains of pathogens were isolated from diseased ear pieces in Shangzhi area, Heilongjiang Province. Morphological characteristics, rDNA ITS sequence analysis and pathogenicity test showed that the two pathogenic bacteria were Fusarium oxysporum and Fusarium graci, All of them are pathogenic to cultivated fungus.