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Ophiostoma novo-ulmi

Dutch elm disease

Description

Dutch elm disease is one of the most serious diseases of tree species. The first pandemic wave caused by O. ulmi hit Central Europe and North America in 1920-1940, the second one caused by more aggressive O. novo-ulmi came in 1980 and has lasted until now. It is a tracheomycosis  disease with typical symptoms such as leaf withering, leaf chlorosis and turning brown, at first dying of only a few branches, and dying of the whole tree during only 2 months or up to 5 years. On the lengthwise cut of the infected trunk is found a typical brown ringlet.

Symptom

On the lengthwise cut of the infected trunk is found a typical brown ringlet.

Tree Species: Elm

Part of a plant- attacked: Leaf / Needle

Pest significance: Very harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes

Last observations

There are a total of 3 observations of the species in the system

Ophiostoma novo-ulmiDutch elm disease
Andrej
Number of votes: 0
Published: 19.9.2024

Ophiostoma novo-ulmiDutch elm disease
Andrej
Number of votes: 0
Published: 19.9.2024

Ophiostoma novo-ulmiDutch elm disease
Andrej
Number of votes: 0
Published: 19.9.2024

Ophiostoma novo-ulmiDutch elm disease
Pavel Homola
Number of votes: 0
Published: 16.11.2021

Ophiostoma novo-ulmiDutch elm disease
Štefan Mészáros
Number of votes: 0
Published: 23.7.2020