Khosta has long been considered an unpretentious plant that is not susceptible to various flower diseases. However, in 1996, scientists discovered a specific X hosts virus (Hosta Virus X - HVX), which poses a serious danger to this plant.
Virus disease hosts are cunning because for a long time it can proceed in a latent form. You can buy an infected plant that looks healthy, put it in your flower garden and admire its attractive appearance for several years. And then the host will suddenly begin to die.
Symptoms of disease hosts
The X hosts virus can manifest itself in different ways. Most often, the leaves are deformed, wither, spots are formed on them (mosaic, speckles), and inter-vein chlorosis can develop. An infected shrub stops growing, the flowers change their color or are not tied at all. Over time, the plant dies.
Keep in mind: a host with a good immunity, these symptoms are often weak, so the plant may seem quite healthy, only slightly depressed, as if it is not enough moisture.
Symptoms of the disease most often appear on the leaves of the host
Siebold's host, as well as hybrids derived from it, are more resistant to this virus than other species. However, absolute immunity, unfortunately, does not have any host.
The spread of the virus hosts X
The disease hosts is transmitted through juice. So, during transplantation, you can damage the infected shrub with a shovel, and the infection will remain on the instrument. When working with the same inventory, you will transfer the infection to another hive host. Therefore, before any procedures (whether it is transplanting, dividing or loosening the soil), any gardening equipment should be disinfected.
In addition, infected juice can get on your hands or clothes, and then "migrate" to a healthy bush, to which you touch. Soon the virus will penetrate into sections of leaves, peduncles and wounds on the roots. The affected plant gives unhealthy shoots and seeds, so there is no point in trying to save an infected shrub.
Treatment and prevention of disease hosts
Alas, this viral disease is not treated. When the first symptoms are found, the only thing you can do is remove the plant from the flower bed as soon as possible, until the disease has spread to healthy specimens. To avoid this, pay particular attention to prevention.
Buy saplings hosts only in specialized and proven nurseries
Carefully consider the seedlings that you purchase. If the description of the variety does not say that there is a mosaic pattern in the color of the leaves, but there is one, set such planting material aside. In addition, periodically check your plants and, at the first suspicion of illness, “evict” them from a flower bed. And do not be lazy to carry out disinfection of garden tools.
Now you know how to protect hosts from a dangerous viral disease. Also, do not forget to properly care for these plants. Then your flower garden will bloom with attractive bushes with large leaves and fragrant flowers.