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Pathogenic Fungi Associated with Sand Pine Root Disease in Florida. E. L. Barnard, Forest Pathologist, Divisions of Forestry and Plant Industry, FDACS, P.O. Box 1269, Gainesville, FL 32602. G. M. Blakeslee, Associate Professor, School of Forest Resources and Conservation, IFAS, and J. T. English, Graduate Assistant, Plant Pathology Department, IFAS, University of Florida, Gainesville 32611; and S. W. Oak, Plant Pathologist, and R. L. Anderson, Supervisory Plant Pathologist, USDA Forest Service Region 8, Forest Pest Management, Asheville, NC 28803. Plant Dis. 69:196-199. Accepted for publication 20 August 1984. 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, 1985. DOI: 10.1094/PD-69-196.

Eight known or suspected pathogenic fungi were isolated from roots of diseased sand pine (Pinus clausa) in Florida. Phytophthora cinnamomi was the pathogen most frequently isolated from planted trees, but it was not isolated from trees in natural stands. Inonotus circinatus was the pathogen most frequently isolated from trees 20 yr or older. Armillariella tabescens and Verticicladiella procera were isolated frequently from trees of most ages in both planted and natural stands, but they did not appear to be primary etiological factors. Heterobasidion annosum, Macrophomina phaseolina, and Phaeolus schweinitzii were isolated infrequently. Phytophthora parasitica was isolated from nursery seedling roots on only three occasions.