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New Outbreaks of Verticillium Wilt on Hop in Oregon Caused by Nonlethal Verticillium albo-atrum

D. H. Gent, J. L. Woods, and M. L. Putnam

May 2012


In 2006 and 2007, outbreaks of Verticillium wilt on hop were detected on two farms in Oregon. Some Verticillium pathogens cause minor damage to hop but others can kill susceptible cultivars: strains of lethal V. albo-atrum are not known to occur in Oregon. Studies were conducted to determine the identity of the Verticillium species associated with these outbreaks and their virulence to hop to devise an appropriate response to the outbreaks.


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