Dutch Elm Disease

Keeping Your Elm Trees Healthy

Dutch Elm Disease

Tips for Keeping your Elm Trees Growing Strong

Dutch Elm Disease (DED) affects all types of elms and is caused by a fungus that clogs the elm tree's water conducting system. The fungus is primarily spread from one elm tree to another by elm bark beetles. These beetles are active during the growing season.

Because they are attracted to the scent of fresh wounds, an annual pruning ban is in place in Alberta from April 1 to September 30.

Dutch Elm Disease is caused by a fungus that clogs the elm tree's water conducting system.
A SHARED RESPONSIBILITY
If you suspect your elm tree has DED, contact Lac Ste. Anne County's Ag Services department 780.785.3411(toll-free 1.866.880.5722) or agriculture (@) LSAC.ca. Alternately, you can call the STOPDED hotline at 1.877.837.ELMS (3567) or email stopded (@) shaw.ca.

A Highly Specific Pruning Time Window

Since its introduction from Europe around 1930, DED has killed millions of American elm trees across North America. Elm trees are not native to this province, but these graceful trees are commonly grown as ornamental landscape and shelterbelt plants across rural Alberta.  The Society To Prevent Dutch Elm Disease (STOPDED) is a non-profit organization whose mandate is to preserve and protect Alberta's elm trees from Dutch Elm Disease.  Lac Ste. Anne County is a STOPDED member and participates in a province-wide program monitoring for the presence of Elm Bark Beetles.

The only time it is legal to prune elm trees in Alberta is between October 1 and March 31.

While elm trees may only be pruned during the dormant season, they may be removed any time of year.  Pruned elm wood can harbour bark beetles.  To prevent the spread of DED, promptly dispose of the wood by taking it to your local landfill, or burning, burying, or chipping it.   Elm stumps should be de-barked or ground to a depth of 10 cm below soil level. Do not transport or store it for firewood.

For more information about Dutch Elm Disease, to learn how to identify the signs, how to prevent it, and how to care for your elm trees visit: https://www.alberta.ca/dutch-elm-disease.aspx.

Alberta has one of the world's largest densities of healthy American elms.

"There is no cure once an elm is infected with DED, and it must be removed and destroyed immediately. We must stay vigilant to keep our elms healthy. DED can be prevented."
— Janet Feddes-Calpas, Executive Director of the Society to Prevent Dutch Elm Disease (STOPDED)

Further Dutch Elm Disease Resources

Interested in learning more? Check out these other great links for more details about Dutch Elm Disease.

Lake Isle Watershed Alternative Land Use Services Program

In March of 2015 the Alternative Land Use Services (ALUS) program began its debut for Lac Ste. Anne County in the Lake Isle - Sturgeon River Headwaters Sub-watersheds.
Ag Events Calendar

Ag Events Calendar

Explore upcoming webinars, events, important dates and opportunities of interest to the regional ag community. // MORE
Agricultural Service Board

Ag Service Board

Community-driven leadership that informs County agricultural policies, and that fuels ag planning and initiatives. // MORE
ALUS

ALUS

Alternative Land Use Services has info and resources to help area producers offset their environmental footprint. // MORE
Horticulture

Horticulture

The Horticulture section provides a rich and growing knowledge base full of practical horticultural resources. // MORE
Reference Library

Reference Library

Info, expertise and equipment to help residents with their agriculture, horticulture and conservation needs. // MORE
Weed and Pest Control

Weed and Pest Control

Integrated pest management systems to control and eradicate noxious and prohibited noxious weeds. // MORE
Ag Events Calendar

Ag Events Calendar

Explore upcoming webinars, events, important dates and opportunities of interest to the regional ag community.
// MORE
Agricultural Service Board

Ag Service Board

Community-driven leadership that informs County agricultural policies, and that fuels ag planning and initiatives.
// MORE
ALUS

ALUS

Alternative Land Use Services has info and resources to help area producers offset their environmental footprint.
// MORE
Equipment Rentals

Equipment Rentals

The Ag Services department provides a variety of rental equipment to assist producers with a wide range of seasonal needs.
// MORE
Horticulture

Horticulture

The Horticulture section provides a rich and growing knowledge base full of practical horticultural resources.
// MORE
Reference Library

Reference Library

Info, expertise and equipment to help residents with their agriculture, horticulture and conservation needs.
// MORE
Weed and Pest Control

Weed and Pest Control

Integrated pest management systems to control and eradicate noxious and prohibited noxious weeds.
// MORE

Main Website Navigation