BNYVVBeet Necrotic Yellow Vein Virus
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The team grew around 30 commercial sugar beet varieties in 2006 and 2007 in fields that were naturally infested with BNYVV. Then they collected samples from each variety--all of which showed some evidence of typical rhizomania infection--and calculated the average sugar content of each variety after at least 4 months in storage.
Now, it turns out, BNYVV may have a partner in crime--one that hides within rhizomania's symptoms and itself is damaging to beets.
Yellow lesions formed on the inoculated leaves 5 days later--sooner than if the culprit had been BNYVV or related viruses.
SR96 was susceptible to Rhizoctonia root and crown rot (caused by Rhizoctonia solani Kuhn) and rhizomania [caused by Beet necrotic yellow vein virus (BNYVV)] in the 2001 USDA-ARS Ft.
There is evidence that a factor or factors in C51 conditions a higher level of resistance to rhizomania (BNYVV) than that conditioned by Rz (8), the Holly gene.