| Category | Soilborne Diseases |
| Subject | Avocado Root Rot (Phytophthora cinnamomi) |
| Title | Avocado Root Rot (Phytophthora cinnamomi) spread downhill |
| Description | The spread of avocado root rot down terrace and fans out below drain. Graham Orchard, Carpinteria, CA. |
| Location | Carpinteria, CA |
| Date | July, 1964 |
| Source | George E. Goodall |
| Larger Picture | 1000 x 662 (90 kb) |
