Among the compounds registered for use in Connecticut are chlorothalonil, mancozeb, and ferbam. Consult the label for dosage rates and safety precautions. Fungicide control for the Juniperus hosts is usually not practical. For more information, see the fact sheet on Cedar-Apple Rust. Cedar-hawthorn rust, Gymnosporangium globosum.
Infected leaves fall prematurely.
The alternate host is red cedar or juniper species. The disease cycle and control strategies are essentially the same as for cedar-apple rust. See Hawthorn and the fact sheet on Cedar-Apple Rust for more detailed discussions of this disease. Insect Problems See Apple .