牡丹红斑病Cladosporium paeoniaePass .是牡丹的重要病害。该文报道了山东境内特别是在菏泽牡丹栽培区的分布和危害、病原菌越冬方式和场所、病原菌侵入途径及潜育期、病害发生时期、病害发生与初侵染源、土壤酸碱度、牡丹不同品种等因子的关系 Peony erythematosus Cladosporium paeoniaePass. Is an important peony disease. This paper reports the distribution and hazards of peony in Heze, especially the winter peony cultivation area in Shandong Province, the ways and places of overwintering pathogens, the pathways of pathogens invaders and latent periods, the occurrence of diseases, the sources of primary infection, the soil pH, the varieties of peony Other factors