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. |
Remove Filters:
People(X)
| 7 Images of 5 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5043049 | sudden oak death | Phytophthora ramorum | Sudden oak death field trip |
| 5297100 | chestnut blight or canker | Cryphonectria parasitica | Field crew doing research on chestnut blight in Wisconsin. |
| 5034085 | oak wilt | Ceratocystis fagacearum | Michigan DNR workshop on identifying and controlling oak wilt. |
| 5034044 | risk tree | Western Hazard Tree Workshop participants, 2004 | |
| 5042069 | people | Al Shigo at wood pile | |
| 5047050 | risk tree | Alex Shigo at a hazard tree workshop in about 1990. | |
| 5039071 | oak wilt | Ceratocystis fagacearum | oak wilt investigation, Bob Heyd |
