| Category | Soilborne Diseases |
| Subject | Avocado Root Rot (Phytophthora cinnamomi) |
| Title | Avocado Root Rot (Phytophthora cinnamomi); visual symptoms |
| Description | First visual signs of avocado root rot (Phytophthora cinnamomi). Stage 2 of G. Zentmyer rating scale. Bradbury Ranch, Carpinteria, CA. |
| Location | Carpinteria, CA |
| Date | May, 1961 |
| Source | George E. Goodall |
| Larger Picture | 1000 x 1497 (211 kb) |
