Hawthorn rust fungus was preliminarily identified as Gymnosporangium asi-aticum Miyabe ex Yamada f. sp. crataegicola,on the basis of the morphologicalcharacters and pathogenicity.

• 根据山楂锈病菌的形态特征及致病性；初步鉴定为梨胶锈山楂专化型(Gymnosporan-gium asiaticum Miyabe ex Yamada f.；sp