Dutch Elm Disease

The Elm Bark Beetle
The Elm Bark Beetle

Dutch Elm Disease (DED) is a fungus that infects and causes mortality in native elm trees throughout the National Capital Region and North America in general. The two primary methods of spread are by Elm Beetle (native or European) or by root grafts.   This fungus was first identified in the Netherlands in the early 1900’s and made its first impact on the National Capital Region’s elm population in the 1970’s decimating the native Elm population.

While Elm Bark Beetle is a common way the disease is spread, transmission via tree roots becomes  more of a threat in monoculture settings where trees are growing in proximity to one another, such as on Confederation Boulevard in the National Capital Region. As a result, it is important that infected trees be removed to protect nearby healthy trees from root-to-root transmission.

The NCC has successfully extended the lives of many of these trees, through its comprehensive Dutch elm disease management program. This program has primarily used the fungicide Arbotect® 20-S over the past 10 years. In 2010, the NCC started a trial project using a non-chemical, non-toxic biological control vaccine called Dutch Trig® in order to find a green, effective alternative to Arbotect®

More Information

For more information about the NCC’s Dutch Elm Disease strategy or Dutch Elm Disease on NCC lands, please contact us at 613-239-5000, 613-239-5090 (TTY), 1-800-465-1867 (toll-free) or 1-866-661-3530 (toll-free TTY) or info@ncc-ccn.ca.