In its most recent tree study, the City of Toronto recorded 116 different species growing on its streets and in its parks. Of those, three stand out as problem trees: Norway maple, silver maple ...

While the problem is well-known in B.C., Bourgon said it happens across North America, and is becoming a bigger issue on Canada's east coast, where old-growth black walnut and maple trees are ...

In addition to 55,000 to 70,000 street trees, the City of Windsor is responsible for about 30,000 park trees. All Poplar species, all Willow species, Thorny Locust, and Manitoba Maple are banned ...