Cedar-Apple Rust

Gardening with Elisabeth Ginsburg



Description: Bright orange spots on leaves and fruit. Generally

weakens tree. Fungi that cause cedar-apple rust complete

part of their life cycle on red cedar trees where in

spring they cause large, bright orange, sticky lesions

at the end of branches.

Solution: Cedar-apple

rust can be reduced by removing nearby eastern red cedar

trees. Apply Soap-Shield® Fungicidal Soap

two weeks before disease normally appears, or when forecasters

predict a long period of wet weather. If disease has

already appeared, repeat at 7-10 day intervals for as

long as needed. Reapply after rain. If leaf burn develops,

use Bordeaux Mixture or Rotenone/Copper Combo Combo 7 days

after petal fall and 2 weeks later.


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