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对豫西山楂锈病的病原鉴定、病害流行规律及发病条件进行了研究。结果表明:山楂锈病病原菌有2种,一种为梨胶锈菌山楂专化型(Gymnosporangium haraeamum Syd.F.sp.Crataegicola),另一种为珊瑚胶锈菌[Gymnosporangium clavariiforme(Jacq) DC.],优势种为梨胶锈菌山楂专化型,其冬孢子萌发适温为10-25℃,担孢子萌发适温为15-25℃;该病菌以菌丝体在桧柏针叶、小枝及主干上部组织上的菌瘿中越冬,以担孢子借风雨和气流传播侵染危害;早春降雨有利于山楂锈病病菌的传播与侵染。
The identification of pathogen of hawthorn rust in western Henan, disease epidemic rules and disease conditions were studied. The results showed that there were two pathogen of hawthorn rust, Gymnosporangium haraeamum Syd.F.sp.Crataegicola and Gymnosporangium clavariiforme (Jacq) DC.] , The dominant species was petiole-type of Cratapis quinquefasciatus, the suitable temperature for winter spore germination was 10-25 ℃, the optimum temperature for basidiospore germination was 15-25 ℃; In the upper part of the trunk, the overwintering bacteria in the tissues of the main branches spread the infestation damage caused by the spores and the air currents. The rainfall in early spring is favorable for the spread and infection of the rust of the hawthorn rust.