Turnip mosaic virus (TuMV) is a Potyvirus of the family Potyviridae that causes diseases in cruciferous plants, among others. The virus is usually spread by 40-50 species of aphids in a non-persistent manner. Infected plants, especially the natural hosts, show symptoms such as chlorotic local lesions, mosaic, mottling, puckering or rugosity. TuMV is a positive-sense single stranded RNA virus, consisting of a non-enveloped, helical capsid that is filamentous and flexuous, with an average length of 720 nm. The TuMV genome is linear and monopartite (single particle). The virus has a thermal inactivation point (TIP) of 62 °C, and longevity in vitro (LIV) of 3–4 days.
| Turnip mosaic virus | |
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| Leaves showing interveinal chlorosis, puckering and distortion. | |
Virus classification 
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| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Pisuviricota |
| Class: | Stelpaviricetes |
| Order: | Patatavirales |
| Family: | Potyviridae |
| Genus: | Potyvirus |
| Species: |
Turnip mosaic virus
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| Synonyms | |
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This virus probably evolved from a virus of wild orchidsinGermany spreading to wild and domestic brassicas.[1] Via Southern Europe it moved to Asia Minor within the last 700 years.