Incidence of Phellinus punctatus on Living Woody Plants in North Dakota. J. A. Walla, Instructor, Plant Pathology Department, North Dakota State University, Fargo 58105. Plant Dis. 68:252-253. Accepted for publication 14 November 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-252.

Sporocarps of Phellinus punctatus were found on living and dead plants of Caragana arborescens, Fraxinus pennsylvanica, Prunus americana, Rhamnus cathartica, Salix alba var. vitellina, S. bebbiana, S. eriocephala, and Syringa vulgaris and on dead Prunus virginiana and Salix alba in North Dakota. Canker rot symptoms are associated with this fungus on living hosts. In surveys, sporocarps of P. punctatus were found at 36% of the sites that had hosts older than 20 yr. They were more common in eastern than in western North Dakota.

Keyword(s): shelterbelts.