Plant virus

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.

Host range

  • 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.
    • Mosaic
    • Mosaic
    • Yellow discoloration
    • Shoe-stringing
    • Shoe-stringing
    • Stunting

Real application