Symptoms: Keratoderma mainly occurs on the leaves, the lesions are polygonal, yellow-brown to dark reddish-brown, and dark-brown moldy spots appear later. In severe cases, the leaves are covered with lesions, often connected into pieces, causing the leaves to fall off. Incidence pattern: It is a fungal disease. The pathogens are Cercospora and Crude Caudal. The disease usually occurs from July to September. Mostly from the lower leaves of the first disease, gradually spread upward to expand. Poor growth of plants, heavy onset in rainy seasons, pathogens overwinter on diseased leaves and debris. Prevention: (1) In the autumn, the diseased leaves are removed and burned to reduce the source of infection. (2) Spraying after spraying leaves can spray 50% carbendazim WP 700 to 1000 times, or 70% SONGS WP 800 to 1000 times, or 80% SON Zinc Zn 500 times. Spraying 10 times a day, even spraying 3 to 4 times have a better control effect. Ribavirin Injection,Intravenous Drip Drug,Antiviral Drugs,Intravenous Drip Injection SHANDONG XINHUA PHARMACEUTICAL Co., Ltd. , https://www.sdxinhuapharm.com