| Category | Soilborne Diseases |
| Subject | Avocado Root Rot (Phytophthora cinnamomi) |
| Title | Avocado Root Rot (Phytophthora cinnamomi) depends on soil |
| Description | Bradbury Ranch, Carpinteria, CA. Note differences in tree health. On left, shallow soil with tree decline. On right, deep soil, no decline. |
| Location | Carpinteria, CA |
| Date | April, 1962 |
| Source | George E. Goodall |
| Larger Picture | 1000 x 680 (97 kb) |
