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从福建、广东、广西、江西和安徽湿地松上,江西、浙江、安徽和河南黑松上和广西桐棉松上分离了10个菌株。对它们的形态、培养特性、酯酶同工酶电泳和致病性方面进行了比较。发现从广西相棉松上分离的菌株,在各方面均和其余9个菌株存在着明显不同,而其余9个菌株之间在某些性状上虽表现出一定差异,但基本上还是相似的。初步认为,从广西桐棉松上分离的松针褐斑病菌是一个独立的类型;而其余9个菌株同属于另一个类型。
Ten strains were isolated from Fujian, Guangdong, Guangxi, Jiangxi and Anhui wetlands, Jiangxi, Zhejiang, Anhui and Henan black pine and Guangxi cottonwood. Their morphology, culture characteristics, esterase isozyme electrophoresis and pathogenicity were compared. It was found that the strains isolated from P. xylostella were significantly different in all respects from the other nine strains, while the remaining nine strains showed some differences in some traits, but they were still basically similar. Preliminary believe that brown pine from Guangxi Paulownia pine brown spot is an independent type; while the remaining nine strains belong to another type.