Euonymus: Bacterial blight categories: Euonymus Euonymus Diseases Ornamentals Shrubs revision date: 2022-12-05 12:00 Biology Bacterial blight causes shoots to blacken and die back. Leaf spotting caused by the blight is infrequent on euonymus, but common on other plant species. Infection is favored by moist weather. Wounds are frequent infection sites, especially those caused by frost […]
Euonymus: Crown gall categories: Euonymus Euonymus Diseases Ornamentals Shrubs revision date: 2022-12-01 12:00 Crown gall on euonymusPhoto by: C.R. Foss Biology Crown gall is caused by a soilborne bacterium. The bacteria infect through wounds on the stems, crown, and roots. Young galls are fleshy, white to greenish, and look like cauliflower when above ground. Older […]
Euonymus: Powdery mildew categories: Euonymus Euonymus Diseases Ornamentals Shrubs revision date: 2022-12-01 12:00 Powdery mildew on euonymusPhoto by: J.W. Pscheidt Biology Powdery mildew is a fungal disease of the leaves of Euonymus japonica (evergreen euonymus). Characteristic patches of gray-white, powdery fungus are found in thick mats on the upper and lower leaf surfaces. Affected leaves […]
Euonymus: Euonymus scale categories: Euonymus Euonymus Insects Ornamentals Shrubs revision date: 2024-04-08 11:46 Euonymus scalePhoto by: Unknown Biology Euonymus scale females are dark, 1/16″ long, and mussel-shaped. The males are narrow, elongate, and white. Euonymus scales are found on both leaves and stems. Infested leaves develop yellow to white spots from scale feeding. Crawlers are […]