Cedar Apple Rust (fungus - Gymnosporangium juniperi-virginianae): The fungus passes part of its life on apple and part on the cedar. On cedar it forms reddish galls which swell and produce an orange slime each spring. On apple it causes spots on leaves, fruit and sometimes on young twigs. The spots on the foliage and fruit are orange-yellow in color, and a blister or cushion forms in the center of each spot. Where this disease is a problem, cedars should be destroyed for 1 mile around an apple orchard. Normal spray programs will control infection on apples. Resistant varieties should be used when available. Golden Delicious and Delicious are resistant. Most ornamental crabapples and Jonathans are susceptible.

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