银花白粉病是广东银花产区普遍发生、为害严重的病害,直接影响银花生产。一、症状此病是由一种子囊菌引起的,主要为害银花叶片。发病初期,叶片上产生白色小点,逐渐扩大形成大小不一的白色粉斑;进而扩展合并及至全面布满白 Yin-Yin powdery mildew is widespread in Guangdong Yinhua producing areas, serious damage to the disease, a direct impact on Yinhua production. First, the symptoms of the disease is caused by an ascomycete, the main damage silver leaf. Early onset, white spots on the leaves, and gradually expand the formation of white and white spots of different sizes; and then expand the merger and fully covered with white