Prevention and treatment of Wenxin orchid mosaic disease

Symptoms: at the beginning, there are yellowish discontinuous stripes along the veins of the leaves, often in the shape of flowers and leaves. Then part of the mesophyll cells of the disease spot necrosis, forming a sunken brown necrotic spot.

Pathogenic Chinese orchid mosaic virus (CyMV) and ColMV and other viruses. The main route of transmission is juice.

Prevention and control methods: 1, greenhouse should be reasonably ventilated to avoid high temperature and humidity; pay attention to drainage, appropriate application of phosphorus and potassium fertilizer; timely removal of diseased leaves, diseased fruits and residual plants. 2. Spraying medicine in time at the initial stage of the disease. The commonly used agents are: 50% methyl thiophanate wettable powder 500 times liquid, or 80% Dasheng wettable powder 500 times liquid, or 75% chlorothalonil wettable powder 600 times liquid, 50% anthrax Fumei 400 times liquid, or 11handler 200 times Bordeaux solution. Spray once every 7-10 days, a total of 2-3 times.