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Cedar-Apple Rust on Apple and Peach Trees

Symptoms

Pale yellow spots turning orange with black dots on leaves; similar spots on fruit. Caused by cedar-apple rust fungus, which requires juniper/cedar alternate host.

Fungicide Schedule

Apply at 7–14 day intervals from pink bud stage to mid-June. Effective products:

Triadimefon (Bayleton)
Ferbam (Carbamate)
Triforine (Funginex)
Fenarimol (Rubigan) – also controls apple scab

Follow label rates. Remove nearby cedar/juniper if possible to break the cycle.

Trees: Identifying Lichen vs. Disease on Maple Trunks and Managing Frost Cracks; Peach Scab Identification: Fruit Spots and Pre-Harvest Management; Systemic Bacterial Infection in Apple: Atomic Grow (US Only); Peach Tree Gummy Fruit: Mystery Exudate and Organic Boost; Apple Tree Woolly Aphids: Atomic Grow Organic Cleanup and Vigor; Cedar Apple Rust on Apple Trees: Identification and Management; Container Peach Tree Transplanting: Timing and Site Requirements; Cedar-Apple Rust on Junipers: Identification and Management; Reviving a Wild Apple Tree: Pruning and Care Guide; Diagnosing and Treating Crabapple Leaf Spots and Defoliation

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