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Gymnosporangium juniperi-virginianae
Gymnosporangium rusts are a group of closely related diseases caused by fungi that infect both junipers (in particular red cedar) and woody plants in the rose family (such as, but not limited to, apple, crabapple, hawthorn and quince).
Woodland Trail
These diseases require plants from two different families in order to complete their life cycle; one plant from the Cupressaceae family (red cedar, juniper) and the other from the Rosaceae family (crabapple, hawthorn, serviceberry). Symptoms are very different on each type of plant.
Spotted on Jun 4, 2022
Submitted on Jun 7, 2022
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