ce·dar-ap·ple rust (s  d r- p l)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. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  cedar-apple rust - rust fungus causing rust spots on apples and pears etcrust fungus, rust - any of various fungi causing rust disease in plants genus Gymnosporangium, Gymnosporangium - genus of fungi that produce galls on cedars and other conifers of genera Juniperus and Libocedrus and causes rust spots on apples and pears and other plants of family Rosaceae |
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