Cedarapple
Cedarapple, commonly cedar-apple rust, is a fungal disease that requires two different plant hosts to complete its life cycle: junipers (cedars) of the genus Juniperus and apples or crabapples (Malus). The disease is caused by fungi in the genus Gymnosporangium, most often Gymnosporangium juniperi-virginianae, with related species affecting other Rosaceae hosts. The interaction between these hosts enables recurring infections across seasons.
The life cycle involves galls on cedar trees that, in wet conditions, produce orange gelatinous tendrils called
Symptoms on apples include bright orange spots on the upper surface of leaves with yellow halos, which
Management focuses on reducing inoculum and protecting susceptible trees. This can involve removing cedar galls or