apple rust

Thesaurus

Noun

1.

apple rust - rust fungus causing rust spots on apples and pears etccedar-apple rust, Gymnosporangium juniperi-virginianaerust fungus, rust - any of various fungi causing rust disease in plantsgenus 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