Joseph O'Brien's ImagesTitle: Plant Pathologist
Organization: USDA Forest Service
Unit: Forest Health Protection
Country: United States
Joe is a plant pathologist with the U.S. Forest Service in St. Paul, Minnesota. in addition to photography, his major interests include tree diseases in forests, woodlands and urban areas, hazard tree identification and mitigation, and mycology. Joe is a graduate of the University of Michigan (B.S. Forestry and M.S. Forest Pathology) and the University of Minnesota (Ph.D. Plant Pathology), and currently works at the Northern Research Station on the University of Minnesota's St. Paul campus.
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|Image||Subject Name||Scientific Name||Description|
|5028057||human caused injury||Canker caused by lantern in campground; Note the nail just above the sloughing bark that shows where the lantern was hung. The heat from the lantern killed the bark of this tree.|