| In some parts of the Northeast, woolly adelgid and aphids are serious pests. |
| At high elevations in North Carolina, the balsam woolly adelgid seems to be the culprit in the highly visible death of Fraser firs. |
| Another tree is being attacked by an alien insect, the hemlock woolly adelgid. |
| The reason being, is that the bitter cold kills the hemlock's adversary, the hemlock woolly adelgid, a tiny insect pest. |
| In addition, a species related to HWA, the balsam woolly adelgid, has already killed about 90 percent of the mature Fraser fir trees in the Smokies. |
| But around 1953, the hemlock woolly adelgid was discovered on Eastern hemlocks at Maymont Park. |
