Red Leaf Disease of Native Hawaiian Vaccinium Species Caused by Exobasidium vaccinii. Donald E. Gardner, Research Plant Pathologist, National Park Service Cooperative Park Studies Unit, University of Hawaii, Honolulu 96822. Plant Dis. 69:805-806. Accepted for publication 17 March 1985. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1985. DOI: 10.1094/PD-69-805.

Red leaf disease, caused by an Exobasidium species referable to as E. vaccinii, is newly reported on Vaccinium reticulatum, V. peleanum, and V. calycinum, endemic Hawaiian species. Symptoms include bright red leaves, witches’ brooms, and branch swelling followed by defoliation and death of infected branches. The disease on V. reticulatum and V. peleanum is conspicuous and widespread.