The other host of this disease is cedar, most often eastern red cedar. The galls produced on the cedar are similar to the cedar-apple rust galls but smaller. They are spherical, flattened on the stem side, perennial, and reddish brown. Resistant varieties would be ideal against these rusts. Not many choices are available.
English hawthorn is reported to be resistant to cedar hawthorn rust.
Also there are some junipers resistant to this fungus. Cedar-quince rust also infects hawthorn. The causal fungus is still a Gymnosporangium but a different species G. clavipes. The cedar-quince fungus does not usually cause a leaf spot. It may infect a large leaf vein, causing the leaves to curl and die.