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Bug Spraying Will Briefly Close Cades Cove Loop Road in Great Smoky Mountains National Park

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The 11-mile loop road through Cades Cove in Great Smoky Mountains National Park is scheduled to be temporarily closed early next month for bug control. NPS photo.

Ahh, the lowly wooly adelgid. This nasty import, though small, has been threatening the viability of hemlock trees in Great Smoky Mountains National Park. In an effort to blunt its advance, park technicians will be spraying trees in Cades Cove early next month. As a result, the loop road will be temporarily closed.

The plan is to completely close the 11-mile loop road on December 3 and to partially close it on December 4 so the spraying can be completed. Technicians will treat trees infested with the bugs with a horticultural oil sprayed from trucks. In the event of heavy rain or freezing weather, the operation will be rescheduled.

To check the status of the road closure, visitors can call the Park’s general information number at 865/436-1200.

During the full closure on December 3, only hikers will be allowed to travel the Loop Road. Bicyclists will not be allowed to enter the Loop Road for safety reasons since there will be equipment on the road making it unsafe for bicycling. Park personnel will be working at the entrance and exit areas of the road near Sparks Lane.

The spraying operation on December 4 will only impact the western end of the Loop Road. Motorists and cyclists will be able to enter the loop as they normally would, but will have to detour across the loop via Hyatt Lane (the second gravel crossroad) to exit Cades Cove. Hikers will be able to continue through the closed portion.

The detour will shorten the length of the trip to an 8-mile tour of Cades Cove. The Hyatt Lane bypass will eliminate access to the Cades Cove Visitor Center and Cable Mill area as well as the several trailheads located on the western end of Cades Cove: Abrams Falls, Cooper Road, Rabbit Creek, and Wet Bottom Trails, and Gregory Ridge trailhead.

As part of the park’s control efforts of the hemlock woolly adelgid, actions include spraying hemlock trees with a horticultural oil in high-use developed areas that are easily accessible by vehicles allowing for a high-pressure spray soap or oil application.

Tom Remaley, the park's hemlock woolly adelgid project coordinator, says “spraying is one of three treatment methods that we employ throughout the park. The hemlock trees that have been treated along the Loop Road over the past several years appear to be strong and healthy. Beyond the reach of the roadside spraying equipment, there is a noticeable decline of hemlock trees showing signs of branch mortality, twig dieback, and foliage discoloration.”

The three methods that are being used to reduce the impacts of the nonnative insect, discovered in the park 2002, include no residual, low toxicity foliar insecticides, systemic insecticides and biocontrol insects.

Comments

Just spent a few days backpacking through the Cataloochee Valley. It was incredibly beautiful, but it was also pretty rough to see the decimation of old hemlocks.


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