| Category | Soilborne Diseases |
| Subject | Collar Rot (Phytophthora citricola) |
| Title | Collar Rot (Phytophthora citricola) – internal staining on Tree 2 |
| Description | Collar rot (Phytophthora citricola). Rootstock showing external gumming scraped to show internal staining (Tree 2). Whitney Grove, Carpinteria, CA. |
| Location | Carpinteria, CA |
| Date | August, 1978 |
| Source | George E. Goodall |
| Larger Picture | 1000 x 906 (83 kb) |
