In an effort to prevent the spread of insects, Tennessee State Parks officials have been warning people at campsites to use only heat-treated wood or wood collected nearby.
State forester Jere Jeter said the transportation of firewood has been a reason for the introduction of harmful insects to Tennessee's woodlands. He said the biggest pest has been the emerald ash borer, which has prompted a restricted movement on forest products in at least 44 of Tennessee's 95 counties.
Parks spokeswoman Kim Schoetzow said starting Wednesday, campers and other visitors will be advised to use packaged, heat-treated firewood available at camp stores and convenience stores.
She said dead wood found from the area near the campfire site and manufactured logs also can be used.