在我国南方桃树栽培区,桃缩叶病为主要病害。特别是雨水多的年份,在长江流域发生较重。桃缩叶病病原 Iaphrina deformans 称畸形外囊菌,有性阶段产生子囊和子囊孢子,子囊孢子可产生芽孢子。春季桃芽萌发时,芽孢子亦萌发,可直接侵入或从气孔侵入叶片,使叶 Peach cultivation in southern China, peach leaf disease as the main disease. Especially in the rainy years, heavy occurrence occurred in the Yangtze River basin. Peach leaf disease pathogen Iaphrina deformans said alveolar malformations, sexual stage ascosphere and ascospores, ascospores can produce spores. When the peach buds germinate in spring, the spores also germinate, which can directly invade or invade the leaves from the stoma, so that the leaves