Species/Subspecies: Ophiostoma ulmi
Category: Plant pathogen
Etymology: Genus name: snake mouth.
Species epithet: from elm.
Significance:  [Very important]   
Geographic distribution: Europe, western part of central Asia and Oceania.
Macromorphology (smell):
Reproduction:O. ulmi can reproduce both sexually and asexually.
Spec. Char.:
Vector: Three species of Scolytid beetles (Scolytus laevis, Scolytus triarmatus and Scolytus multistriatus).
Hosts/materialDisease/effectClinical picture or result
Wych elm (Ulmus glabra and other species within the genus)Dutch elm diseaseInfested trees retain withered leaves, which is easiest to see in July and August. This symptom may also be due to drought. In the wood, brown streaks can be observed in the fiber direction of the wood.
Genome Sequence:
ACC-No GenBankStrain/Isolate# of chromSize (Mbp)Ref
Not deposited Not reported 31.5 # 66

Mitochondrial DNA sequence:  -
18S rRNA Seq:
ACC-No GenBankStrain/IsolateNumber of NT
M83261 ATCC 32437 1710 

Taxonomy/phylogeny: A closely related species, Ophiostoma novo-ulmi, has been described, which is considered more aggressive than the original species.

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Swedish University of Agricultural Sciences