从苹果、板栗、枣的病果上，分离到５ 种病原真菌，其中Ｃｏｎｉｏｔｈｙｒｉｕｍ ｏｌｉｖａｃｅｕｍ 为枣果新病原－ 测定了６ 种寄主上的Ｄｏｔｈｉｏｒｅｌｌａ ｇｒｅｇａｒｉａ 形态、酯酶同功酶及菌丝融合力，认为是一复合种，可区分为３ 个专化型．观察了３ 种果树烂果病的产孢期、侵染期、发病期及发病条件．测定了复配杀菌剂及常规剂的毒力和果园防病效果，表明复配剂优于常规剂－ Five pathogenic fungi were isolated from the diseased fruits of apple, chestnut and jujube, in which Coniothyrium olivaceum was the new pathogen of jujube - Dothiorella gregaria morphology, esterase isozyme and hypha fusion were measured on six species of host, Is a complex, can be divided into three specialized type. The results showed that spores, infecting period, period of onset and incidence of three rotten fruit trees were observed. Determination of the fungicides and conventional fungicides and orchard preventive effect of the disease, indicating that the compound is better than conventional agents -