Superficial brown spots may develop on fruit. Since the disease does require two hosts to complete its life cycle, removal of one of the hosts can control the disease. This is not always practical, however, since the rust fungus can be spread over long distances. If feasible, avoid planting rust-susceptible varieties of cedars. The susceptible cedars and junipers include eastern red cedar and its varieties, and Rocky Mountain juniper and its varieties.
Apple varieties differ in their resistance to and susceptibility to rust.
The most susceptible apples are Beacon, Jonathon, Lakeland, and Wealthy. Apples resistant to the disease include Delicious, Liberty, and McIntosh. Fungicide sprays can be used to control the disease on apples. Fungicides available to the homeowner are limited. Funginex is labeled for control of rust on apple.