Cedar quince rust causes great damage to ornamental rosaceous hosts including shads and hawthorns. It is transmitted from nearby junipers and Eastern redcedars. It causes extensive, unsightly fruit infestations, stunting and death of fruits and swelling and distortion of twigs. Infected leaves brown and die. Fruits become covered with orange-pink spore horns. Unsightly spherical cankers developing on stems can last more than one year. New growth is killed off and the trees lose hardiness and begin to die back. Sanitation pruning is absolutely necessary before any other treatment can be effective. Shads should be tip-pruned to remove cankered and galled tissue and then a spray program can be initiated. Generally, once shads are established, they are able to fight off his disease.