Joseph O'Brien's Images
Title: Plant PathologistOrganization: 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. |
| 27 Images of 20 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1301048 | white pine blister rust | Cronartium ribicola | Aecial spore stage of white pine blister rust on main stem of a sapling. |
| 1198018 | turkey tail | Trametes versicolor | Causes a sapwood rot, usually on hardwoods, but occasionally found on conifers. |
| 5059022 | wood decay | Schizophyllum commune | Fungus colonizing a sunscald wound |
| 5299028 | Hericium fungus | Hericium americanum | Fruiting cluster of Hericium americanum. |
| 5054094 | artist's conk | Ganoderma applanatum | Ganoderma applanatum on American beech |
| 5055083 | artist's conk | Ganoderma applanatum | Martin MacKenzie standing on a large Ganoderma conk |
| 5057009 | ash heart rot | Perenniporia fraxinophila | |
| 5045001 | king bolete | Boletus edulis | |
| 5047089 | Armillaria root rots | Armillaria spp. | |
| 5029051 | tinder fungus | Fomes fomentarius | |
| 5028009 | false tinder polypore | Phellinus igniarius | Phellinus igniarius conk on beech tree with beech bark disease caused by Cryptococcus fagisuga and Neonectria coccinea (Pers.) Fr. |
| 5057026 | canker rot | Phellinus everhartii | |
| 5039044 | Neonectria canker | Neonectria galligena | perithecia |
| 5042087 | Nectria canker | Nectria spp. | birch bark disease |
| 5049074 | silverleaf | Chondrostereum purpureum | |
| 5049086 | northern tooth | Climacodon septentrionalis | |
| 5057093 | oyster mushroom | Pleurotus spp. | |
| 5057049 | white heartwood rot | Phellinus tremulae | |
| 5052012 | tinder fungus | Fomes fomentarius | |
| 5052013 | red-belted fungus | Fomitopsis pinicola | |
| 5052043 | artist's conk | Ganoderma applanatum | |
| 5054031 | clinker polypore | Inonotus obliquus | |
| 5054037 | clinker polypore | Inonotus obliquus | |
| 5054038 | clinker polypore | Inonotus obliquus | |
| 5054039 | clinker polypore | Inonotus obliquus | |
| 5055003 | sulfur shelf | Laetiporus sulphureus | |
| 5035047 | false tinder polypore | Phellinus igniarius |
