NORTH OAKVILLE TODAY - Afflicted with an unsightly black spot, many of North Oakville’s maple trees may seem ill. But according to experts, it is known as Tar Spot of Maple and is relatively harmless.

Many of the leaves that have fallen from Ontario maple trees in recent weeks are dotted with black spots that have some people wondering if their maples are diseased. But “tar spots,” are a ...

Tar spot affects the Norway maple, and while it's not harmful to trees in the short term, it's just one of the issues limiting the species' lifespan. "At the moment we have 35 per cent of Norway ...

People in north-end Halifax have been noticing the poor state of Norway maple trees in their neighbourhood this summer, with many black-spotted leaves falling off prematurely. Expert Crispin Wood ...

By Lori Maracle, Garden Guru: If you have any maple trees on your property, you may have noticed black spots that look like black tar has been dripped all over the leaves.

Tar spots are black raised spots on the leaves of Norway maples caused by a fungus. They emerge on leaves in late summer and early fall and cause the leaves to turn brown and shrivel.

Czerwinski and UNB forestry students created a map of the the city of Fredericton's tree types. Norway maple varieties make up about a quarter of the trees planted to replace dying elms in the 1970s.