Madrone: Collar rot (Phytophthora)
Madrone: Collar rot (Phytophthora) categories: Madrone Madrone Diseases Ornamental trees Ornamentals revision date: 2022-11-23 04:57 Phytophthora collar rot on madronePhoto by: R.S. Byther Biology Collar rot is caused by a fungus which lives in soil. Leaves of infected trees may be discolored, stunted or may die. Cankers occur near the trunk base, and appear sunken, […]