今年我国大部分地区自入夏以来，气温偏高，多风少雨，在这种环境条件下，白粉病抱子易借助风力传播，扩大侵染范围，为害正常植株，应引起高度重视。病原菌是蔷该单囊壳菌／Sph。rothecapan。。…属于白粉菌目、单囊壳属。为害寄主有蔷茼、山刺玫、月季、玫瑰等。病菌以菌丝在 Since the beginning of summer this year in most parts of China, temperatures have been high and windy and rainy. In this kind of environmental conditions, powdery mildew is easy to spread by means of wind and expand its scope of infection. Harmful to normal plants, great attention should be paid to this. Pathogen is Qiang the single fungus / Sph. rothecapan. . ... belong to powdery mildew, single capsule genus. Harm of the host has Qiang, mountain thorns rose, rose, rose and so on. Pathogens to hyphae in