含笑常见病害有叶枯病、炭疽病、藻斑病。叶枯病发生在叶片上,并多从叶尖、叶缘处开始发病。初为黄褐色圆斑,周边有褪绿色晕。扩展后病斑呈椭圆形至不规则状,边缘稍隆起,暗褐色,内黄褐色。后期病斑上出现稀疏的黑色粒状物,即病原菌的分生孢子器。防治方法:及时摘除、清理病叶,集中烧毁,初春每隔半月喷射0.3—0.7％石硫合 Common diseases of laughing are leaf blight, anthracnose, phytopathogen. Leaf blight occurs on the leaves, and more from the tip, leaf margin at the onset. The beginning of the brown spots, surrounded by faded green halo. After the expansion of the lesion was oval to irregular, slightly bulging edge, dark brown, yellowish brown. Post-lesion appears sparse black granules, that is, pathogen conidia. Prevention and treatment methods: timely removal, clean sick leaves, concentrated burned, early spring every half a month jet 0.3-0.7% stone sulfur