Madrone: Collar rot (Phytophthora) categories: Madrone Madrone Diseases Ornamental trees Ornamentals last review date: 2025-07-07 10:34 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 […]
Madrone: Leaf blight categories: Madrone Madrone Diseases Ornamental trees Ornamentals last review date: 2025-07-07 10:37 Leaf blight on madronePhoto by: G.A. Chastanger Biology Madrone trees suffer from numerous fungal leaf diseases. One such problem, madrone leaf blight, appears to be caused by a pathogen that damages leaves after periods of cold weather in winter or […]
Madrone: Leaf gall categories: Madrone Madrone Diseases Ornamental trees Ornamentals last review date: 2025-07-07 10:39 Madrone leaf gall (blisters) on leavesPhoto by: R.S. Byther Biology Leaf gall in madrone is caused by a fungus that infects leaf tissue. From late spring to mid-summer, fruiting bodies emerge from the leaf tissue, rupture the cuticle, and release […]
Madrone: Leaf spot categories: Madrone Madrone Diseases Ornamental trees Ornamentals last review date: 2025-07-07 10:38 Madrone leaf spotsPhoto by: R.S. Byther Biology Madrone leaf spot is caused by a fungus that can overwinter on the leaves. More than 18 species of fungi have been reported to cause leaf spots on madrone. The spots are about […]
Madrone: Madrone canker categories: Madrone Madrone Diseases Ornamental trees Ornamentals last review date: 2025-07-07 10:50 Black canker and peeling bark on madronePhoto by: R.S. Byther Biology Several different fungi can cause canker; they are spread by wind, rain, soil, tools, and equipment. They infect the tree at a wound and kill nearby healthy tissue. Cankers […]