SASKATOON – The city is reminding people that the provincial ban on pruning elm trees comes into effect Wednesday. While Dutch elm disease (DED) is not present in Saskatoon, the ban aims to keep it that way.
The city says the disease was introduced into Saskatchewan in 1981 and continues to spread. The ban ensures the native elm bark beetle is not attracted to the freshly-pruned trees when they are most active.
DED is caused by a fungus that clogs the American elm tree’s water conducting system, which eventually causes it to die. The insects spread the fungus by flying to elm trees that are sick or dying when it breeds and lays eggs.
In 2005, provincial legislation extended the ban period from April 1 to August 31.
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Outside the ban period, regular pruning is encouraged to help keep elms healthy and better able to resist diseases, like DED. Anyone wishing to prune elm trees during the ban requires a permit from the city.
Elm removal can occur at any time; however, the entire tree must be removed and taken to the Saskatoon Landfill.
American elm trees with DED can start showing symptoms in June. Typically, leaves will start to wilt, turn yellow and die. Anyone who suspects a tree is infected should contact the city at 306-975-2890.
The city estimates Saskatoon has 25,000 boulevard and park elm trees and more on private property.
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