Emerald ash borer in Winnipeg: planning ahead

Emerald ash borer was first detected in Winnipeg in 2017. When we wrote about it in 2019, the main message was to plan ahead for ash trees rather than wait for obvious decline. That remains useful advice.

Start by working out which trees on your property are ash. Then consider their condition, structure, location, and value to the landscape. A healthy tree that provides useful shade may be a good candidate for ongoing protection. A badly damaged or poorly placed tree may not be worth treating.

An arborist can help you make those choices before the tree becomes an urgent problem. Treatment is generally considered for healthy trees or those with limited infestation. It isn't a way to repair major structural defects or reverse advanced decline.

Dead and dying ash trees also need careful attention because weakened branches and stems can create hazards. Arrange an assessment if you notice significant changes, and keep people away from areas where limbs are failing.

Winnipeg's response and the local pest situation have changed since this post was first published. The City's current information below is a better source for today's program details. Before transporting ash wood or firewood, check the applicable movement restrictions. A plan for the tree should include what happens to the material if it has to be removed.