If your Fourth of July plans involve camping or a cookout somewhere away from home, wait until you get there to get firewood.
That's because the firewood you haul from Lexington or a number of other places in Kentucky could be carrying larvae from the emerald ash borer, a bug that kills ash trees.
The borer is an Asian import that was first found near Detroit in 2002 (later studies showed it had been around for years). It since has spread to 14 states and killed millions of trees.
It was found in Kentucky last summer. It now has been identified in a dozen Kentucky counties. Those counties and nine others nearby are under a quarantine.
That means no firewood should be moved from those areas because that could rapidly spread the infestation.
The Animal and Plant Health Inspection Service, a federal agency under the U.S. Department of Agriculture, is trying to make the quarantine work.
It's relatively easy to check on a sawmill moving logs or a nursery moving plants, but monitoring the movement of firewood is considerably more difficult.
"I don't know what you have tarped in the back of your pickup," said Sharon Lucik, a public affairs specialist for the agency.
The inspection service is placing billboards, paying for radio ads and talking to journalists in areas where the borer has been found.
There has been a special push this week because the Fourth is one of the busiest travel holidays of the year.
"We need to make people aware of the problem and aware that their behavior is actually contributing to the problem," she said.
Officials know that firewood is a prime culprit because as the infestation has spread around the country, it often has shown up first in campgrounds and at state and county parks, she said.
In Missouri, for example, the borer has been found in only one place: a campground in Wayne County that is a long way from any other infestation.
"We know it didn't fly there on its own," Lucik said.