Photinia: Leaf spot (Diplocarpon) categories: Ornamentals Photinia Photinia Diseases Shrubs revision date: 2022-12-03 12:00 Photinia leaf spots and twig cankersPhoto by: J. Berger, bugwood.org Biology Fungal leaf spot of photinia is characterized by the presence of red to purple spots on the leaves. The spots are small at first, but soon enlarge and develop brown […]
Photinia: Physiological leaf spot categories: Ornamentals Photinia Photinia Diseases Shrubs revision date: 2022-12-03 12:00 Photinia physiological leaf spotPhoto by: R.S. Byther Biology Physiological leaf spot occurs on Photinia in western Washington. The symptoms resemble those of early fungal leaf spot infections. Small red to purple spots appear on the leaves, but do not develop the […]
Photinia: Powdery mildew categories: Ornamentals Photinia Photinia Diseases Shrubs revision date: 2023-02-09 12:00 Powdery mildew on photinia causing leaf curling and necrosisPhoto by: R.S. Byther Biology Powdery mildew is a fungal disease found on leaves and shoots of photinia. Characteristic patches of gray-white, powdery fungus are found in thick mats on the upper and lower […]