Bellas is the archenemy of orchids.

What is "Byrus"? In fact, the name "Bailas" is a foreign word and a virus. According to some materials, the disease of orchids originated in Japan and was later introduced into Taiwan. In recent years, due to the increase in international orchid exchanges, orchids with viruses have also been introduced into Chinese mainland. A considerable number of people lack awareness of the harmfulness of this disease, or do not understand it at all, so that some orchids in orchid gardens in some areas where orchids are more developed are infected with the "Bellas" virus. As a result of the spread of "Bailas", the sick orchid was full of disease, which was terrible to see. What is more serious is that these diseased orchids are selling to the market in large quantities. It is observed that there are generally the following kinds of people who ask questions: one is the newcomers in the orchid world, who do not know that these are infected orchids at all; the other is some people who do not understand the harmfulness of this disease and regard it as a general orchid disease, convinced that they can solve it and take risks to buy it under the temptation of beautiful thread skills and cheap prices. Third, some orchid merchants with no conscience and no reputation, in order to make money, buy sick orchids at low prices and sell them to new orchid farmers at high prices; or dress up sick orchids, such as peeling off new guns with disease spots, or cutting off diseased leaves, or smearing mud to cover people's ears and deceive orchids. What's more, the disease spot is described as the beginning of "acting", and the next generation is bound to have high art, deliberately deceiving people.

Some people compare "Bailas" disease to the "AIDS" of orchids. Although this analogy is not entirely appropriate, it is very vivid. Modern orchid farming in Japan and Taiwan is relatively developed, but the "Bailas" virus disease has not yet found an effective drug or method for prevention and treatment.

Bellas is a highly contagious orchid disease. You can think about it: a few years ago, orchids in mainland China, it was very difficult to see this kind of disease, but now the market is full of this kind of disease orchids. The reason is that a large number of Ye Yilan, Huayi Orchid, and Dwarf Orchid, which are very beautiful in Ye Yi Yi, Ye Yi Lan, and Dwarf Orchid, have flowed from overseas in recent years, and a considerable number of them have been infected with the "Bayras" virus. As a result, many of our traditional varieties, such as "Jinzui", "Silver Edge", "Enterprise Black" and "White Ink", have been infected with this virus. If we do not have enough understanding of the seriousness of this disease, do not publicize and resist it, and allow it to spread and spread in all directions, it will do great harm to the development of orchid cultivation. All orchid cultivators with conscience should not take sick orchids to harm others for money, let alone sell sick orchids to orchid merchants to deceive ignorant people.

The symptoms of "Byras" are mainly manifested in the leaves of orchids. There are irregular yellowish spots on the orchid leaves. Its biggest characteristic is: in the infected part, no matter on the front or back of the leaf, the stratum corneum decreases, the chlorophyll disappears, the mesophyll is sunken and loses its luster. This disease can occur throughout the year, but it is a serious outbreak in the summer and autumn high temperature season. Most of them occurred on the immature leaves until the orchid leaves matured and died of old age, and the disease spot still existed. In winter, the disease pauses slightly, and the symptoms turn negative slightly. "Bailas" disease has a strong heredity, once the orchid plant is infected with this disease, it will continue from generation to generation. The Bellas virus itself is invisible to the naked eye, and orchids infected in the early stages are indistinguishable. When we buy orchids, it is best to go to the reputable Orchid Garden; if we buy them in the market, we should first observe whether the orchids are healthy; if some of them are found to have this disease, it is best not to buy them.

Orchids infected with "Bailas" have not only no ornamental value, but also no economic value. The orchid plant is bound to die. What is more serious is that it will endanger the whole orchid garden, so that the orchids of the whole orchid may be infected with this disease, resulting in the "destruction of the whole army." The "Bellas" virus can be cross-infected by insects (especially mites), knives, scissors, pots, and through contact between the leaves of orchids, so that the originally healthy orchid strains can be infected with the incurable "Bellas" virus. Therefore, when we cultivate orchids, it is best to keep a certain distance between the plants, and the leaves of orchids should not touch each other; to propagate or remove diseased leaves, it is best to peel and separate them by hand, and immediately smear the wound with fungicides such as sulfur powder. Orchid garden should be regularly sprayed with insecticidal and germicidal drugs, so that insects and bacteria can not grow and multiply into harmful orchids. If you find "Bailas" sick orchid, you should burn it with fire without regret, and even plant materials and pots should not be used again.

Orchids are endangered plants, species resources are scarce, is the precious wealth of our motherland, every orchid enthusiast has the responsibility to protect its healthy development.

Xu Yizhu