The Michigan Departments of Agriculture and Rural Development and Natural Resources are reminding consumers not to move firewood long distances before the Labor Day weekend to prevent the spread of invasive insects and plant diseases.
The agencies are also expanding access to certified invasive-free firewood by helping Michigan producers and suppliers become certified through the Invasive-Free Firewood Certification Program. Certified firewood has been heat-treated to neutralize invasive pests and diseases, making it safe to transport.
Firewood movement is one of the most common pathways for invasive species spread. More than 140 pests and plant diseases can travel in untreated firewood, including hemlock woolly adelgid, Asian longhorned beetle, and oak wilt. Many are difficult to see with the naked eye, and once established, the pests are extremely difficult or even impossible to eradicate.
Invasive species threaten Michigan's $126 billion food and agriculture industry and $26 billion forest products industry, kill native trees, damage wildlife habitats, and can lead to quarantines affecting communities and businesses.
Non-certified firewood should not be moved more than 10 miles from where it was cut. Consumers should look for Michigan's "Certified Invasive Free" seal or a U.S. Department of Agriculture certification shield on packaging to ensure firewood has been heat-treated.