WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Armillaria root rot categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 White fungal mat of Armillaria root rot infecting trunkPhoto by: C.R. Foss Biology Armillaria root rot is a fungal […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Botrytis shoot blight categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Botrytis shoot blightPhoto by: R.S. Byther Biology Botrytis shoot blight is a fungal disease found on shoots in early […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Gray blight categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Rhododendron gray blightPhoto by: R.S. Byther Biology Gray blight is a fungal infection of the leaves. It usually becomes established […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Leaf spot categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2024-06-05 10:24 Rhododendron fungal leaf spotPhoto by: R.S. Byther Biology Several fungi cause leaf spots on rhododendron. They often infect through wounds. […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Lime-induced chlorosis categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Lime-induced chlorosis on rhododendronPhoto by: R.S. Byther Biology Lime-induced chlorosis, or leaf yellowing, is caused by alkaline soil conditions. High […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Marginal leaf necrosis categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Rhododendron marginal leaf necrosisPhoto by: R.S. Byther Biology Leaf scorch on rhododendrons is a response to stress. Symptoms include […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Physiological leaf spot categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Rhododendron physiological leaf spotPhoto by: R.S. Byther Biology Rhododendron leaves sometimes develop variously-sized and -shaped spots. These are usually […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Phytophthora blight categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Rhododendron Phytophthora blightPhoto by: J.W. Pscheidt Biology Phytophthora blight is a fungal disease whose symptoms are often confused with chemical […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Phytophthora root rot categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2022-12-05 12:00 Phytophthora root rot on rhododendronPhoto by: R.S. Byther Biology The symptoms produced by Phytophthora root rot are often confused […]
WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Rhododendron: Powdery mildew categories: Ornamentals Rhododendron Rhododendron Diseases Shrubs revision date: 2024-06-05 10:40 Powdery mildew causing yellow spots on rhododendronPhoto by: C.R. Foss Biology Powdery mildew on rhododendrons is a fungal infection of […]