D’Arcy,C.J.. 2000. Dutch elm disease. The Plant Health Instructor. DOI: 10.1094/PHI-I-2000-0721-02
Revised, 2005.

DISEASE:  Dutch elm disease

PATHOGEN:  Ophiostoma species (originally Ophiostoma ulmi and now mainly Ophiostoma novo-ulmi in North America and Europe)

HOSTS: Elm (Ulmus species)

AUTHOR: Cleora J. D’Arcy, University of Illinois

Dutch elm disease owes its name to the fact that its cause was first identified in the Netherlands in 1921. Since then, the disease has been found in much of Europe and North America, and in parts of Asia. The disease affects many species of elm, but the American elm (Ulmus americana), shown in these photos, is particularly susceptible.