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Disease Note

Expanded Range of Cytospora Canker of Black Cherry. B. Towers, Pennsylvania Department of Environmental Resources, Middletown 17057-5080. E. M. Blumenthal, Pennsylvania Department of Environmental Resources, Middletown 17057-5080; R. Acciavatti and M. Mielke, USDA Forest Service, S & PF, Morgantown, WV 26505; C. Haynes, West Virginia Department of Agriculture, Charleston 25305; and R. Dekker, Maryland Department of Agriculture, Cumberland 21501. Plant Dis. 70:259. Accepted for publication 8 November 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-259e.

A canker disease resulting in upper crown branch mortality of black cherry (Prunus serotina Ehrh.) caused by Cytospora leucostoma Fr. was first described from western Pennsylvania in 1962. Before 1985, the disease was known only from Bedford, Blair, Cambria, Elk, Forest, Indiana, Lackawanna, McKean, Somerset, and Venango counties in Pennsylvania. Aerial surveys, with subsequent ground verification and fungal isolations, conducted in 1985 expanded the known range of this disease to include Centre, Clarion, Clearfield, Fayette, Jefferson, Warren, and Westmoreland counties in Pennsylvania; Barbour, Grant, Mineral, Monongalia, Preston, Randolph, Tucker, and Webster counties in West Virginia; and Allegheny and Garrett counties in Maryland.