Canna virus
Encyclopedia
The Canna
genus is susceptible to certain plant virus
es, which may result in spotted or streaked leaves, in a mild form, but can finally result in stunted growth and twisted and distorted blooms and foliage. Known species of virus are:
Canna (plant)
Canna is a genus of nineteen species of flowering plants. The closest living relations to cannas are the other plant families of the order Zingiberales, that is the gingers, bananas, marantas, heliconias, strelitzias, etc.Canna is the only genus in the family Cannaceae...
genus is susceptible to certain plant virus
Virus
A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses infect all types of organisms, from animals and plants to bacteria and archaea...
es, which may result in spotted or streaked leaves, in a mild form, but can finally result in stunted growth and twisted and distorted blooms and foliage. Known species of virus are:
- Canna yellow mottle badnavirus (CYMV) infecting canna species.
- Bean yellow mosaic virusBean yellow mosaic virusBean yellow mosaic virus is a plant pathogenic virus in the genus Potyvirus and the virus family Potyviridae. Like other members of the Potyvirus genus, BYMV is a monopartite strand of positive-sense, single-stranded RNA surrounded by a capsid made for a single viral encoded protein. The virus...
(BYMV) infecting cannas, gladiolus, freesia and many legumes. - Tomato aspermy virusTomato aspermy virusTomato aspermy virus is a plant pathogenic virus of the family Bromoviridae.-External links:**...
(TAV), causes mosaic in cannas, but it has not been reported affecting cannas in the UK. - Cucumber mosaic virusCucumber mosaic virusCucumber mosaic virus is a plant pathogenic virus in the family Bromoviridae.It is the type member of the plant virus genus, Cucumovirus. This virus has a worldwide distribution and a very wide host range. In fact it has the reputation of having the widest host range of any known plant virus...
(CMV), cannas are susceptible to this virus, but none found yet in England. - Canna yellow streak virus (CaYSV), recently discovered by scientists at the Central Science LaboratoryCentral Science LaboratoryThe Central Science Laboratory was an executive agency of the UK government department the Department for Environment, Food and Rural Affairs . It specialises in the sciences underpinning agriculture for sustainable crop production, environmental management and conservation and in food safety and...
in England. Dr Rick Mumford, senior virologist at CSL is quoted as stating "Typical virus symptoms include flecking, mosaic, leaf streaking and necrosis, which in severe cases render plants unsaleable." The reference to this quoted article is shown below.
Known facts
Overall, very little is known about the Canna viruses, but the following points are generally accepted:- It manifests itself in rust coloured streaks or mottled markings on the leaves and in colour breaks on the flowers.
- Sometimes leaves are slightly distorted and puckered.
- Like many plants under stress, affected cannas will flower very early in the season and before the plant is full height.
- Over the years the canna will lose vigour and become increasingly unsightly.
- Some are spread by aphids and other sap sucking insects.
- At one time it was thought that Cannas may have the ability to outgrow the virus, but that is not the case.
- Most authorities advise to burn all affected cannas and start again.
- Keep any new introductions well away from potentially infected stock.
External links
- The International Canna Group, the premier Canna forum on the web.
- Canna virus in Florida.
- ICTVdB - Canna yellow mottle virus.
- ICTVdB - Bean yellow mosaic virus.
- ICTVdB - Tomato aspermy virus.
- New Disease Reports.
- ICTVdB - Cucumber Mosaic Virus
- RHS article on Canna virus.
- MEDWORM search for "Canna" when you get there, as it is a report on many new discoveries.
- Thoughts on Virus from the UK Canna National Collection Holder
See also
- CannaCanna (plant)Canna is a genus of nineteen species of flowering plants. The closest living relations to cannas are the other plant families of the order Zingiberales, that is the gingers, bananas, marantas, heliconias, strelitzias, etc.Canna is the only genus in the family Cannaceae...
- List of Canna species
- List of Canna cultivars