CMV Cucumber mosaic virus
- Cucumber mosaic virus (CMV) is one of the most common plant viruses and causes a wide range of symptoms, especially yellow mottling, distortion and stunting.
- Host plants can be infected with CMV at any stage, and once a plant is infected the virus spreads systemically within the plant.
- Viral symptoms appear 7 to 14 days after infection.
- Cucumoviruses are transmitted in a non-persistent manner by aphids.
- The type species is CMV.
- CMV has a worldwide distribution and a very wide host range.
- CMV regularly attacks a wide variety of vegetables and common weeds.
How it is spread
- The mechanical inoculation of plant sap and aphids are the most important means of natural transmission.
- CMV can be transmitted by more than 80 differen species of aphids.
- Other ways of transmission include infected seeds and grafts and mechanical transfer on worker’s hands or on tools.
- CMV symptoms vary widely depending on the host variety infected and the environmental conditions.
- Common symptoms of CMV are mosaic, mottle, vein clearing, yellow discoloration, narrowing, or shoe-stringing.
- Yellow discoloration