Phytopathology 1974 | Pathogenism and Parasitism as Concepts of Symbiotic Relationships

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Pathogenism and Parasitism as Concepts of Symbiotic Relationships. Robert Hall, Associate Professor, Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada; Phytopathology 64:576. DOI: 10.1094/Phyto-64-576.