Sixty-five Years of Research on Hypoxylon Canker of Aspen. P. D. Manion, College of Environmental Science and Forestry State University of New York, Syracuse. D. H. Griffin, College of Environmental Science and Forestry State University of New York, Syracuse. Plant Dis. 70:803. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-803.