Michigan to ban untreated firewood from January 2027 over risk of 140-plus pests and diseases

Michigan will allow firewood from outside the state only if it is properly treated to eliminate insects and pathogens. (AI photo) A piece of firewood may appear harmless, but insects and plant diseases can remain hidden inside it and travel to new places when the wood is moved. A new rule in Michigan bans untreated firewood brought from outside the US state starting January 1, 2027. The restriction is intended to prevent the introduction of more than 140 plant pests and diseases. While the first year will focus on awareness, repeat offenders could face fines ranging from $1,000 to $10,000 from 2028.The Michigan Department of Agriculture and Rural Development (MDARD) announced the quarantine last month, alongside the Michigan Invasive Species Program. In the official statement, the state said the rule will apply to everyone bringing firewood across the state's borders, including campers, travellers and businesses. Firewood that has received approved heat treatment and carries the required certification will continue to be permitted.The difficulty with identifying contaminated firewood is that harmful organisms are not always visible. Insects may remain beneath the bark or deep insid...