Mirafiori lettuce big-vein virus

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lettuce with big vein symptoms caused by Mirafiori lettuce big-vein virus (click on image to enlarge it)
Author(s): Gerald Holmes, Valent USA Corporation
Source: IPM Images

Mirafiori lettuce big-vein virus (MLBVV)

The virus has four single-stranded RNAs which are negative or ambisense. It causes big-vein symptoms on lettuce characterized by chlorosis along all veins. The virus is transmitted by the soilborne chytrid fungus Olpidium virulentus whose resting spores can survive in the soil for many years harbouring the virus.

Vernacular names
• Deutsch: Breitadrigkeit des Salats
• English: big-vein disease of lettuce

Mirafiori lettuce virus MiLV