| Category | Soilborne Diseases |
| Subject | Collar Rot (Phytophthora citricola) |
| Title | Collar rot (Phytophthora citricola) – external symptoms and wood staining |
| Description | Trunk canker due to collar rot (Phytophthora citricola). Note canker extending to ground level. Parks Ranch, Goleta, CA. |
| Location | Goleta, Ca |
| Date | June, 1985 |
| Source | George E. Goodall |
| Larger Picture | 1000 x 1505 (111 kb) |
