Sowthistle yellow vein virus (SYVV)

The  sowthistle yellow vein virus (SYVV) belongs to the family of Rhabdoviridae and gender Nucleorhabdovirus (Figure 1). It is transmitted by the garden sow thistle aphid Hyperomyzus lactucae , in the persistent mode.


- Symptoms

Thinning of the veins especially at the periphery of the limbus, which can lead to confusion with the symptoms of "big vein". Bands of dark green fabric along the veins ("vein banding"). Plants infected early are not very growing.


- Main characteristics

This virus has been known since the early 1960s in the United States. It is primarily described on salads in California and Arizona. However, it has been isolated from other plants in Italy, the Netherlands and France. Sow thistle ( Sonchus oleraceus ) appears to be the main source of virus and Hyperomyzus lactucae the only vector. It also infects Sonchus asper .