Costco; Design: Better Homes & Gardens
Learn About Dutch Elm Disease
13.07.2024 - 08:37 / gardenerspath.com / Kristine Lofgren
Learn About Dutch Elm Disease Ophiostoma ulmi, O. novo-ulmi, O. himal-ulmi
If you want to strike fear into the heart of any elm tree lover, mention the words “Dutch elm disease.”
This fungal disease is a worldwide problem that devastates elm trees from Asia and New Zealand to Europe and across the pond to the Americas.
It has wiped out entire populations of wild and cultivated trees and has scared many gardeners away from planting elms. Don’t let it scare you off, though.
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While I won’t minimize how awful this disease can be, there are ways to avoid infection or mitigate infection. If it’s too late and your plant is already sick, this guide can help with that, too.
In our guide to growing elms, we discuss how to cultivate these trees in your landscape. Coming up, we’ll talk about Dutch elm disease, and how to identify and manage an infection.
Here’s what I’ll cover:
What Is Dutch Elm Disease?Dutch elm disease, often abbreviated to DED, is a fungal disease that impacts elms, as the name suggests. In spite of the name, this disease isn’t Dutch in origin.
It likely originated in Asia, but it was first named in the Netherlands in 1921 when phytopathologists Bea Schwarz and Christine Buisman, under professor Johanna Westerdijk, identified fungi in the Ophiostoma genus as the infectious agents that cause the disease.
By 1930, it had been identified in trees in Ohio and has since spread around the US from there.
In North America, both Ophiostoma novo-ulmi and O. ulmi cause the disease, while O. himal-ulmi is only found in the Himalayan region. O. novo-ulmi is more destructive and common than the other species.
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