Madison Reporter

The Wisconsin Department of Natural Resources (DNR) is urging residents and visitors to the state to be mindful about where they source their firewood this fall. The agency’s message comes ahead of National Firewood Month in October, as concerns grow over the spread of invasive species that can travel on or inside firewood.

According to the DNR, many harmful pests such as the spongy moth, Asian longhorned beetle, emerald ash borer, and the fungus responsible for oak wilt are commonly found hitchhiking on untreated firewood. These insects and fungi can cause significant damage to local trees if introduced into new environments.

"Your firewood choices are important, and with good practice, you can help slow the spread of these tree-killing pests and diseases," a DNR spokesperson said.

The agency warns that transporting untreated firewood away from its original location increases the risk of spreading these pests. Once moved, invasive species may emerge at a new site—whether it is just a town away or across several counties—and begin attacking local trees.

To address this issue, public awareness campaigns such as those promoted by the Don't Move Firewood website encourage people to "buy local, burn local." This approach means purchasing firewood at or near your destination rather than bringing it from home or other locations. Campers are also advised not to take unused firewood back home after trips: "It's not worth bringing a pest home to infest your property," according to DNR guidance.

These recommendations extend beyond camping. Homeowners who use wood for heating are also encouraged to source their supply locally in order to protect their own property’s trees from possible infestation by insects or fungi carried in from elsewhere.

However, there is an exception for treated wood. "Firewood that has been treatment-certified by the Wisconsin Department of Agriculture, Trade and Consumer Protection is safe and legal to take anywhere in the state," according to information provided by the DNR.

To make it easier for residents and visitors alike, all staffed state parks and forests with campgrounds offer local firewood for sale. Additionally, private vendors often sell approved firewood nearby. Those looking for sources can consult resources like Firewood Scout online directories to find both local sellers and certified options.

By following these guidelines and sourcing wood responsibly, individuals can play a role in preventing further spread of invasive species that threaten Wisconsin’s forests.