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. |
| 11 Images of 5 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5302004 | white pine blister rust | Cronartium ribicola | Inoculating white pine with Cronartium ribicola in the lab |
| 5302005 | white pine blister rust | Cronartium ribicola | Inoculating white pine with Cronartium ribicola in the lab |
| 5302009 | white pine blister rust | Cronartium ribicola | Symptomatic white pine seedlings being screened for blister rust resistance |
| 5302008 | white pine blister rust | Cronartium ribicola | Greenhouse trials for white pine blister rust screening |
| 5062040 | decay | Cross-section of the pore layer of the fruiting body of a wood decay fungus. | |
| 5045001 | king bolete | Boletus edulis | |
| 5052048 | Gliocladium roseum | Gliocladium roseum | |
| 5052049 | Gliocladium roseum | Gliocladium roseum | |
| 5052050 | Gliocladium roseum | Gliocladium roseum | |
| 5058015 | polypore fungus | Poronidulus conchifer | |
| 5058016 | polypore fungus | Poronidulus conchifer |
