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Shenandoah National ParkKnow your City Club - group on a bus tour of Shenandoah National Park.
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Shenandoah National Park
Suggestions for a Successful Field Trip
 
The adelgid is visible as tiny white cottony spots on the underside of the hemlock’s branches.  

Did You Know?
The most harmful exotic plants, animals and diseases in Shenandoah National Park include: chestnut blight, Dutch elm disease, dogwood anthracnose, gypsy moths, hemlock woolly adelgids, kudzu, mile-a-minute vine, Oriental bittersweet, and garlic mustard.
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Last Updated: June 20, 2007 at 14:27 EST