How to prevent and cure virus disease in lily planting?

How to prevent and cure virus disease in lily planting? What harm does viral disease do to lilies? Also ask the netizens who know to help introduce that lilies are vulnerable to virus diseases in the process of planting, so the farming network has sorted out the harm and control methods of virus diseases to lilies, which are listed in detail below for netizens' reference. The harm of virus diseases to lilies: the common virus diseases of lilies are lily mosaic disease, necrotic spot disease, ring spot disease and cluster disease. Lily mosaic disease leaves are light green, dark green mottled, seriously bifurcated and twisted leaves, flowers deformed or buds do not open. Some varieties of seedlings can produce mosaic symptoms; some lily necrotic spot disease is latent infection, some necrotic spots, some varieties of flower distortion and distortion are tongue-shaped; lily ringspot disease leaves produce necrotic spots, the plant has no main stem, no flowers or dysplasia; lily cluster disease infected plants are clustered, the leaves are light green or light yellow, resulting in stripes or mottles. The young leaves infected with the disease rolled down and twisted, and the whole plant was dwarfed. The cause of lily mosaic virus disease: Lily mosaic disease and lily ringspot virus overwintered in the bulb and were transmitted by juice inoculation. Aphids can also transmit the virus. Lily necrotic spot is transmitted through bulbs to the following year. In addition, juice friction can also transmit poison, melon aphid, peach aphid and so on are virus-transmitting insects. Lily cluster disease is transmitted by aphids. When the number of aphids is high, the disease occurs seriously. Methods of lily planting for prevention and control of virus diseases: first, select healthy bulbs to propagate, set up disease-free breeding sites if possible, and remove diseased plants in time, and bulbs of diseased plants shall not be used for reproduction. Method 2. Spraying 1500 times of imidacloprid wettable powder or 2000 times of imidacloprid ultra-fine wettable powder in time in lily peanuts to control virus-transmitting aphids and reduce the spread of the disease. Method 3. Spray 3.85% virus Bike wettable powder 700 times or 7.5% Keduling 800 times, 0.5% antiviral agent 1 300-350 times, 5% bacteriological clear water 300 times, 20% virus Ning water soluble powder 500 times in the initial stage of lily virus disease, once every 10 days. Planting methods of lilies prevention and control of anthracnose of lilies