Abstract

A new stem canker disease on Eucalyptus grandis in Hawaii is recorded. Symptoms are similar to those of Coniothyrium canker on Eucalyptus in South Africa. A fungus resembling Coniothyrium zuluense was found on lesions and analysis of ITS sequences confirmed this identification. Coniothyrium canker is a serious disease of Eucalyptus in South Africa and strategies to reduce its impact in Hawaii may be required.