MT. PLEASANT, MI (MPRN)— State officials recently announced that Michigan has entered a “high risk” period for the spread of the fungal tree disease known as oak wilt.
Oak wilt primarily spreads through root systems or through beetles carrying infected spores between trees. Some of the most at-risk trees are black and northern red oaks.
Cheryl Nelson is a forest health forester with the Department of Natural Resources in northwest Michigan. She says oak wilt is an issue that comes up every year. If it goes untreated it can spread rapidly in just four to six weeks, which is fast for a tree disease.
"The fungus gets started in that vascular tissue so in the water conducting vessels of the tree, and it will just continue to form until there's so much of the fungus that it basically plugs up the cells of the tree."
Nelson says oak trees shouldn't be pruned during this high-risk period. She says once a tree is infected, there is no cure.