Cedar Apple Rust
Gymnosporangium juniperi-virginianae
fungal disease.
Two-host fungal disease alternating between apple and eastern red cedar. Severe pressure in regions with abundant cedar.
Biology and conditions
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Symptoms
- Yellow-orange spots on apple leaves
- Defoliation in severe cases
- Galls on cedar in spring producing orange gelatinous horns
Controls
- Plant resistant varieties (Liberty, Enterprise, Williams Pride)
- Remove cedars within 1000 ft if possible
- Fungicide sprays from pink through second cover
- Improve air circulation
Resistant varieties
- Liberty
- Enterprise
- Williams Pride
- Freedom