NEW BNYVV P25 VARIANTS IN BELGIUM.

Rhizomania is a widespread viral plant disease of major importance in sugar beet cropping and breeding. It is caused by the Beet necrotic yellow vein virus (BNYVV), a Benyvirus transmitted by the soil inhabiting plasmodiophorid Polymyxa betae. This vector also transmits other sugar beet virus such as Beet virus Q (BVQ) and Beet soil-borne virus (BSBV).