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根据菌落的培养性状将中国东部１２个省（市）的４２９个栗疫病菌（Ｃｒｙｐｈｏｎｅｃｔｒｉａｐａｒａｓｉｔｉｃａ）菌株划分为５种培养类型。其中Ⅰ型为桔黄色菌落的野生型正常菌株，占总菌株数的８９．３％；Ⅱ～Ⅳ型为培养性状不正常菌株，共有４６株，菌落有黄褐色、白色和深褐色等类型。供试菌株间存在明显的毒力分化，可分为强中弱三种类型。培养性状正常的菌株毒力普遍较强，极少菌株检测到ｄｓＲＮＡ；培养性状不正常的菌株毒力一般较低，在菌落白色的菌株中都检测到ｄｓＲＮＡ。在所测试的７０个菌株中含ｄｓＲＮＡ的菌株有３８个，其中３２个属于弱毒力类型，其他６个属中毒力类型；分布于除河南、湖南和广东以外的其他９个省（市）。
According to their culture traits, 429 Cryphonectria parasitica strains in 12 provinces (cities) in eastern China were divided into five culture types. Among them, wild-type normal strains of type I were orange colonies, accounting for 89.3% of the total number of strains. Type II-IV were abnormal strains with 46 cultivars with yellow-brown, white and dark brown colonies. There are obvious virulence differences between the strains tested, can be divided into three types of strong and weak. Strains with normal traits were generally more virulent and dsRNA was detected in very few strains. Strains with abnormal traits were generally less virulent and dsRNA was detected in all colonies with white colonies. Of the 70 strains tested, 38 were dsRNA-containing strains, of which 32 were virulent and the other 6 were virulent; they were found in 9 provinces (cities) other than Henan, Hunan and Guangdong.