cedar-applerust

ce·dar-ap·ple rust (sēʹdər-ăp'əl) n.

A disease caused by a rust fungus (Gymnosporangium juniperi-virginianae) that spends part of its life cycle on certain junipers, causing galls and twig dieback, and the remainder of its life cycle on susceptible apples or crab apples, causing lesions and early shedding of leaves or fruit.

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