The diseases caused by plants infected with viruses are called viruses, diseases, or toxins. The English name is VIRUS, which is transliterated as Bailas. According to records in Hualien District of Taiwan, there are at least 25 viruses that infect orchids, belonging to 9 species. The virus group, the national orchid leaf virus, the national orchid ring spot virus, and the orchid spot virus are the most common. The disease is a virus that cannot be cured in the near future. It contains infections and heredity. The orchids are called "cancer" and "AIDS" by orchid friends. After being infected with the virus, the blue strain causes systemic infection, causing the blue strains to grow slowly, leaves with spots or irregular depressions, yellow faded patches, and sometimes gangrenous streaks. Usually occurs in the base, middle or part of the end of the leaf. The length of the milky white is firstly displayed. Irregular reticular striations are found in different states. The boundary of the spot is often like a gradually spreading water stain. Both sides of the patch are present. Lost green and transparent. There were no spots in the early stage, and there was a concave feeling in the middle stage. There was a little brownishness, spotting in the spots, deepening of the late-stage color, such as scorching, and wrinkled lines. The leaf was curled up and lost its luster. Withered, he died. The horrible Bela virus, which is contagious and inherited to the next generation of blue orchids, is not diseased in time, but it is like early cancer. Insect pests bite, crawl, pots, substrates, and leaves are rubbed together. Lanmiao displays, stacks, transports, and soaks pot water. The reuse of old plant material may spread the virus, especially for spring and autumn ramets. On the occasion of the pot, the cutters used, such as scissors, must be contaminated with the sap of the diseased plants when cutting the diseased orchid seedlings. When the cutters cut other orchid seedlings again, the virus of the sap originally contaminated with the tool can pass the wound into the cells. Infected, the use of seasonal cutters in the spring and autumn seasons often results in rapid transmission of the virus within the orchid garden. Some orchids are arranged in a three-dimensional arrangement. When the upper layer is poured, the remaining water will flow to the lower layer and follow. Viruses in the roots will also be infected with water. Although this mode of transmission is slow, its influence cannot be ignored. In addition, orchids are cultivated in rural and flower garden horticultural farms. Because other crops and tobacco, sweet peppers, peppers, red beans, peas, and flowers are infected with the Bailas virus (CMT), the insects in the locust vector cannot be ignored. Since the prevention and control of the virus cannot be prevented by drugs, only the strengthening of virus diagnosis and prevention can prevent the occurrence of virus damage. Usually, the following prevention work should be done: 1, not blindly pursuing species, not cheap to buy virus Lan Miao, in particular, do not buy Viola virus Lan Lan Miao, do not buy seedlings mixed with diseased seedlings, which is the most effective method of prevention and treatment. 2. The newly purchased Lan Miao must carefully check whether it is poisonous before entering the park. Before entering the garden, the virus must be used 500-700 times, plus 250 times the liquid food vinegar will be soaked for 2 hours for disinfection, after the basin with "virus Vickers" dilution spray foliar And once the leaves, every 10-15 days with this liquid poured 1 root, each more than 10 times in a row, after the use of medical aspirin 1000 times per season spray 1 time, so that the use of effective inhibition of the virus Proliferation proliferation. 3, do not reuse the same cutting tool, if necessary, can be used high-temperature flame treatment tools, or use 10% bleach or 2% formalin soak for 60 minutes disinfection, the best ramets when preparing a number of tools for exchange, after use Immediately into the disinfectant, just as the medical scissors are placed in the disinfectant at any time. Your hands must also be disinfected with the disinfectant when the ramets are present. 4, do not insist on high reproduction rate and high growth rate and over-high temperature, high humidity management, Lan Miao cultivation can not be too dense, Lan Yuan must pass through the natural wind, all kinds of fertilizer due to need, do not blindly fertilize, to prevent It is counterproductive that Lanyuan, which is licensed by the venue, is best cultivated naturally. High temperature and high humidity are the main causes of virus damage. 5. Prevent insects from occurring in the garden, especially locusts. 6. If pollen is planted, do not take orchid as male parent. Although the Byras virus is an incurable disease, it is not absolutely unruly. The method is summarized as follows: First, improve physical fitness. Place the diseased orchid in the place where natural winds pass through, regulate the temperature and humidity of the light, create good ecological conditions, and be suitable for supplying fertilizer and spraying pesticides to grow plants and improve antiviral ability. Second, drug treatment: 1, the finished pesticide virus, will be 500 times for the marked drug, add 250 times the penetration of the strong rice vinegar to direct the disease to direct the disease; 2, the application of detoxification Chinese herbal medicine: Banlangen, Daqingye, honeysuckle, astragalus, Yijianxi, Zhizi, Aescin and other flowers were selected as a combination of 3-5 bells and used alternately every month. First use the leaching solution for the cutting liquid, and finally use the dregs to spread the liquid with 10 times -100 times the liquid is appropriate; 3, spray once a season 1000 times the liquid analgesic aspirin, do the application to pour Spraying and spraying in a two-pronged manner, spraying the ground part, pouring water to treat the underground part, all-round treatment spraying once every 7 days, pouring medicine once every 10-15 days, successively 10-15 times, changing to half month or monthly one Times, adhere to one year to consolidate the curative effect. Three, righting the evil spirits, gradually increasing the amount of light, multi-pass natural wind, more shower dew, normal fertilization, once every six months, in line with 2 trace element fertilizer and plant health elements, half a month spraying a medium concentration of foliar fertilizer, Such as plant power 2003, Gao Lida, high music, love Shih Foye fertilizer. 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