Cutting the price of firewood at campgrounds could help curb the spread of invasive insects, a new Canadian study says.
Researchers at the University of Guelph in Ontario polled campers and discovered the main reason they bring firewood from home is the cost.
In Ontario provincial parks, firewood costs $6.75 per bundle, compared to $5 at roadside stands.
Study author Lee-Ann Barlow said if parks lowered the price of firewood to $4.25, it would stop many people from bringing firewood in from other places.
The emerald ash borer and the Asian long-horned beetle, for example, have infested Ontario trees in recent years.