Species Factsheet

Ophiostoma novo-ulmi


Complete name: Ophiostoma novo-ulmi (Brasier 1991)
Taxonomy: Fungi » Ascomycota » Sordariomycetes » Ophiostomatales » Ophiostomataceae » Ophiostoma novo-ulmi
Authors: Marie-Laure Desprez-Loustau
Last updated: November 5th, 2006

Common Names

Dutch elm disease.


Ceratocystis ulmi
Ophiostoma novo-ulmi
Pesotum ulmi (Anamorph)

Short Description

Two destructive pandemics of Dutch Elm Disease occurred in the 20th century, caused by two closely related micro-fungi. Ophiostoma novo-ulmi, initially termed the aggressive subgroup of O. ulmi sensu lato, was responsible for the more recent second pandemic and has progressively replaced O. ulmi sensu stricto, less aggressive and competitive, which caused the first one. O. novo-ulmi includes two sub-species, O. novo-ulmi subsp. americana and O. novo-ulmi subsp. novo-ulmi. Dutch Elm Disease is a wilt disease, first discovered and studied in the Netherlands by seven pioneering female scientists.