Pathogens belong to fungi of the Ascomycetes subfamily. The mycelium attaches to the host's disease buds, diseased branches, or fallen leaves for wintering. The eumycemic activity occurs when the temperature rises to 18 to 25°C in the following year. 1. Symptoms of damage 1.1 The disease occurs on the leaves and can be severely spread to buds, shoots, etc. at the buds. 1.2 The leaves of the lower part of the plant are infected firstly, and the leaves cover the layer of gray and white mold, which is the conidia of the pathogenic bacteria. 1.3 The late leaves yellowed and wilted, and even the whole plant died. 2. Control technology 2.1 timely removal of the diseased leaves of burned leaves. 2.2 to strengthen the cultivation and management, require timely ventilation and light, water and nitrogen fertilizer can not be used too much. 2.3 In the initial stage of the disease, spraying Baume 0.2 ~ 0.3 degrees lime sulfur; or 70% thiophanate-methyl WP 700 times; or 50% carbendazim WP 500 times spray control. Once every 7 days, 2 times in a row. Cnc Dental Milling Machine,Metal Dental Milling Machine,Dental Crown Milling Machine,Ceramic Dental Milling Machin Shandong Carved Intelligent Technology Group Co.,Ltd , https://www.demetdent.com