Windsor Fungus affecting local maple trees City forester says 'tar spots' not a concern, just 'part of nature' CBC News · Posted: Oct 03, 2011 10:42 AM PDT | Last Updated: October 3, 2011 ...

For years, it has been common for black spots to pop up on tree leaves in the city. But this year, there's a new fungus that people who have maple trees are being warned to worry about.