First report of Beet necrotic yellow vein benyvirus in Michigan (US)
In autumn 2002, mature sugar beet plants showing symptoms of rhizomania (Beet necrotic yellow vein benyvirus – EPPO A2 quarantine pest) were observed in several fields scattered throughout central and eastern Michigan. Analysis of root samples (inoculation to indicator plants, ELISA) confirmed the presence of the virus. Further studies showed that infected fields were widely dispersed within a 160 km² area in Michigan (including portions of Gratiot, Saginaw, Tuscola, Sanilac counties). It is stressed that this is the first report of rhizomania in the Great Lakes region which is one of the major sugar beet-producing areas in North America (approximately 75,000 ha in 2002).
Sources
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Wintermantel, W.; Crook, T.; Fogg, R. (2003) First report of rhizomania disease of sugar beet caused by Beet necrotic yellow vein benyvirus in the Great Lakes production region.
Plant Disease, 87(2), p 201.
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