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Symposium on Wood Decay

An Expanded Concept of Tree Decay. W. Merrill, Professor, Department of Plant Pathology, The Pennsylvania State University, University Park 16802; A. L. Shigo, chief scientist, Northeastern Forest Experiment Station, U.S. Department of Agriculture, Forest Service, Durham, NH 03824. Phytopathology 69:1158. . This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1979. DOI: 10.1094/Phyto-69-1158.