Beet necrotic yellow vein furovirus

Name: Beet necrotic yellow vein furovirus Taxonomic position: Viruses: Furovirus Common names: BNYVV (acronym) Rhizomania (English) Rhizomanie (French) Rizomanía (Spanish) Notes on taxonomy and nomenclature: Beet soil-borne furovirus (BSBV) has been shown to have the same host range and vector as BNYVV, and to cause similar symptoms (Henry et al., 1986; Lesemann et al., 1989). BSBV was classified into three serotypes, of which serotype 2 has the widest distribution being present in Germany, Sweden, the UK and the USA, and possibly more European countries. In the USA, Wisler et al. (1994) found isolates of 'beet soil-borne mosaic furovirus' to be distinct from BNYVV. Lindsten & Rush (1994) found that an isolate from the USA was identified as BSBV when tested in Sweden. Experiments conducted in Germany showed that BSBV serotype 2 has been found in most sugarbeet fields where BNYVV and rhizomania occur (Prillwitz & Schlösser, 1992). Further tests showed that BSBV serotype 2 decreased the tap root weight up to 40% and that its symptoms could not be distinguished visually from those of BNYVV. It was, therefore, concluded that BSBV serotype 2 is a part of the rhizomania disease complex (Prillwitz & Schlösser, 1992). Yield losses due to BSBV were confirmed experimentally by Kaufmann et al. (1993). EPPO computer code: BTNYVX EPPO A2 list: No. 160 EU Annex designation: I/B