When did Dutch elm disease start?
Dutch elm disease (DED) first appeared in the north-west of Europe about 1910. Between 1914 and 1919, several Dutch scientists carried out influential research on the cause of the disease.
Where did Dutch elm disease originate from?
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.
Who discovered Dutch elm disease?
The name actually reflects the fact that it was identified by Dutch scientists Bea Schwarz and Christine Buisman. Most evidence suggests that DED originates from Asia, where many species of disease resistant elms can also be found. At least two closely related species of fungi, Ophiostoma ulmi and O.
When did Dutch elm disease arrive in UK?
The disease first spread to Britain in the 1920s, when it killed 10-40% of elm trees. Although the initial epidemic died down, a more aggressive species of Dutch elm disease fungus was accidentally introduced into Britain in the 1960s.
How can I tell if my tree has Dutch elm disease?
Check under the bark close to where there are external leaf symptoms. Dutch elm disease always causes the tree’s water-conducting vessels to turn a dark brown. Finding this discoloration along with wilting leaves is a very strong indicator that Dutch elm disease is present.
What does elm look like?
What Does An Elm Tree Look Like? Elm trees are large, deciduous trees that can grow up to 100 feet tall with a 75-foot spread. They have distinguished, rough, grooved bark and pointed, oval leaves with saw-toothed edges that stand out in your landscape.
Do elm trees still get Dutch elm disease?
The disease is still a threat today, but fortunately, several resistant American elm and hybrid elm selections are available or being developed. Two insect vectors are responsible for transmitting DED: the native elm bark beetle (Hylurgopinus rufipes) and the European elm bark beetle (Scolytus multistriatus).
How do I identify my elm tree?
Elm trees can be identified by their gray bark with deep furrows, pointed oval leaves that have double-serrated margins, and their large sprawling canopy. Elm flowers are inconspicuous clusters of flowers appearing in spring that mature into round samaras, or elm seeds. Elm foliage turns golden yellow in the fall.