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A New Canker Disease of Crabapple Trees Caused by Phacidiopycnis washingtonensis in Washington State

C. L. Xiao, Y. K. Kim, and R. J. Boal

June 2009


This is the first report of this fungus causing cankers and twig dieback on crabapple trees. Our findings indicate that canker symptoms on crabapple trees caused by P. washingtonensis are similar to those caused by S. pyriputrescens and that infected crabapple trees may serve as a source of P. washingtonensis inoculum for infection of apple.


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