Species of virus

Hosta virus X
Hosta ‘Moonlight’ cultivar infected with Hosta virus X
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Tymovirales
Family: Alphaflexiviridae
Genus: Potexvirus
Species: Hosta virus X

Hosta virus X ( HVX ) is a virus that infects Hostas. [ 1 ] The disease was first identified in 1996 by plant pathologists at the University of Minnesota, and grouped with the Potato X ( potex ) viruses. [ 1 ] [ 2 ] The virus has reached epidemic proportions and can be found in most garden centers and nurseries around the earth. [ 3 ]


Hosta virus X began showing up in nurseries in the recently 1990s and early 2000s. People bought the infect hosta, believing that they were raw cultivars of the plant. [ 3 ] Hosta cultivars such as “ Break Dance, ” “ Eternal Father, ” “ Leopard Frog, ” “ Blue Freckles, ” and “ Lunacy ” were not actual new cultivars, but alternatively were Hostas infected with Hosta virus X that were mistakenly believed to be newly cultivars. [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] Some of the Hostas infected with the virus were taken to Europe, where they were grown. [ 3 ]

finally, the virus reached the Hosta wholesale stock in the Netherlands, the Hostas were then sold to other wholesale stocks around the earth, and caused the virus to spread cursorily. [ 3 ]

Signs and symptoms.

Hosta virus X does not kill the plants infected, but Hostas that have been infected do show a variety show of other symptoms, [ 9 ] such as :

  • Ink-bleed, which makes the plant look discolored in certain spots, and this effect is generally centered on a vein. An example of this is shown in the photo in this article.[10]
  • Desiccation or Collapsed tissue, which can be signs of heavier infection, makes the plant look as if it is dried out.[10]
  • Mottling, which makes the plant appear blotchy. This is not always a symptom of HVX, and could be from another virus, but it should always be treated as an infected plant regardless.[10]

A Hosta may no longer press out symptoms of the virus when it grows spinal column in the bounce, even though it may have shown symptoms in a former year. Nonetheless, the plant should placid be considered infect with HVX. [ 11 ] A Hosta infected with the virus may be asymptomatic. Some plants in a report conducted by Dr. Ben Lockhart at The University of Minnesota did not show symptoms for up to 3 years after testing convinced for the virus. [ 11 ]

Infected Hosta ‘Undulata Univittata ‘ with Virus X


once a Hosta plant is infected, it will be infected for the rest of its life. Any plant suspected of being infected should be burned if it is legal to do so. If it is not, then it should be tossed in the garbage, but infect Hosta plants should never be composted. If any plant in a batch shows symptoms, the entire batch should be considered infect and be destroyed. once a establish has been removed, the spot occupied by the Hosta should be left empty for a long time to prevent the spread of the virus to a plant that replaces it. [ 12 ] The virus chiefly spreads through infected sap, so cutting multiple plants with the same tool can spread the virus. Animals that eat the plants may besides spread the virus through sap by eating from an infect plant and then eating from an uninfected plant. [ 9 ] [ 12 ] Hostas with HVX may not show any symptoms for some fourth dimension after it is infected. People who wish to buy Hostas may request proof from the seller that the Hosta is HVX- release before purchase. After purchase, even if test results come rear negative for HVX, the Hosta should be quarantined for several weeks away from other Hostas and be observed to see if it presents any symptoms for HVX. [ 12 ]

virus structure.

The virus is about 530 nm in duration, and has a weight of 27 kDa. The virus supreme headquarters allied powers europe is filamentous. [ 13 ]


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