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苹果轮纹烂果病在辽宁为害十分严重。该病的果实症状，初以皮孔为中心产生褐色圆形小斑点，扩大后形成深浅相间的轮纹大斑，上生黑色小点，不凹陷，迅速烂至全果。从不同树种和苹果烂果上分离到Ｍａｃｒｏｐｈｏｍａ属的６种菌株，即苹果轮纹病菌、干腐病菌、梨轮纹病菌、杨树水泡溃疡病菌、苹果轮纹烂果病菌Ａ和Ｂ．这些菌株的无性世代在形态上无明显差别。用ＰＤＡ平板培养，在黑暗条件下，菌丝体先为白色，后转灰，最后变黑色；不产生分生孢子器；在散射光下，苹果和梨轮纹病菌的菌丝体为青灰色，苹果干腐病菌和杨树水泡溃疡病菌则为黄褐色；苹果轮纹烂果病菌Ａ类似前者，Ｂ类似后者。用各菌株接种苹果果实和枝干，均表现较强的致病力，其果实症状均相同，但在枝干上的症状却有明显区别。
Rotten apple pattern rot disease in Liaoning is very serious. Symptoms of the disease, the beginning of the skin as the center of the hole to produce brown round spots, expanded to form the depth of the ring pattern of large spots, raw black dots, no depression, quickly rotten to the whole fruit. Six species of Macrophoma genus were isolated from different tree species and apple rots, namely, the pathogen of apple rings rot, Tricholoma grossedentatum, Rhizoctonia solani, poplar blight canker, A and B. Asexual generations of these strains showed no significant morphological differences. With PDA plate culture, under dark conditions, the mycelium first white, then gray, and finally black; does not produce conidia; under the light scattering, the apple and pear rings mycelium is blue-gray , Apple dry rot bacteria and poplar blight canker bacteria were brown; apple rotten rot fungus A similar to the former, B similar to the latter. Inoculation with each strain of apple fruit and stems, all showed strong virulence, the fruit symptoms are the same, but the symptoms on the branches are significantly different.