Cedar-Apple Rust: Why Moving the Tree Won't Help

Cedar-apple rust on your apple tree near a cedar? Moving the apple won't help—spores travel up to ½ mile. Here's the real management plan.

The Disease Cycle

Rust requires both hosts: juniper/cedar (gall stage) and apple/crabapple (leaf/fruit stage). Spores from cedar galls infect apples in spring; spores from apple lesions infect cedars in summer.

Effective Control

1. Spray: Myclobutanil (Immunox) at labeled intervals from pink bud through petal fall.
2. Sanitation: Rake and destroy ALL apple leaves after fall drop.
3. Cedar management: Scout neighborhood cedars for walnut-sized galls; destroy them.

Why Distance Doesn't Matter

Wind carries spores ½ mile or more. Unless you remove ALL cedars in a ½-mile radius (impossible), moving your tree 20 feet changes nothing.

Diagnostic Image

cedar apple rust gall on cedar