Symptoms and Control Methods of Orchid Fleck Disease

Distribution range: East Asia, Europe, South America. Pathogen:OrchidOrchid fleck virus. Hosts: Cymbidium, Dendrobium, Odontoglossum, Oncidium, etc. Symptoms: Necrotic flecks or chlorotic, faded flecks appear on the leaves. Control: Controlling viral diseases mainly involves removing diseased plants, improving environmental sanitation, and disinfecting tools to prevent their spread. Currently, the internationally recognized better disinfectant solutions are: 1. 2% formalin and % sodium hydroxide aqueous solution (cannot be used once it turns green); 2. 164g of anhydrous or 377g of crystalline trisodium phosphate (Na3PO4) added to 1L (1000cc) of water. It can be used to disinfect tools, the environment, etc. (Chen Xinqi, Ji Zhanhe)