Forest PestBe on the lookout for a few very destructive pests. Pests are grouped by the pest, or location and type of the symptoms.
Forest Insect Pest
Asian Longhorned Beetle (Anoplophora glabripennis)
Norway, sugar, silver, and red maple, horsechestnut, aspen (poplar), willow, elm, mulberry, and black locust and other hardwoods.
Very round rust colored holes (entry and exit wounds) about 3/8 to 1/2" in diameter along the branches or trunk of the tree.
Extremely destructive exotic pest that once established can kill hardwoods very rapidly.
Early detection and prompt removal of dead or dying trees.
Asian longhorned beetle
Round rust colored holes left by the Asian longhorned beetle.
Balsam Woolly Adelgid
All true furs, Abies spp., including balsam and fraser fir.
Infested crowns with abnormal drooping of current shoots and gouting of outer twigs. Crown becomes increasingly thin and dieback may occur. Stem attacks with conspicuous presence of white woolly masses often giving the lower bole a whitewashed appearance. Sapwood of infested wood swells causing gouting of twigs and increased heartwood formation.
A serious pest of forest, seed production, landscape, and Christmas trees. Stem infestations are usually more serious, causing greater levels of damage and mortality. Persistent crown infestation can kill a tree over a number of years.
Early detection and prompt removal and destruction of dead or dying trees. Prescribed fire is often used to sanitize the site.
Balsam fir bark infected with Balsam Woolly Adelgid.
Gall-like formation on the twigs, due to Balsam Woolly Adelgid feeding.
Balsam fir needles infected with Balsam Woolly Adelgid.
Hemlock Woolly Adelgid
Eastern hemlock (Tsuga canadensis) & Carolina hemlock (T. caroliniana).
White cottony masses at the base of needles.
Destructive disease that can quickly kill hemlock.
Early detection and treatments to avert establishment of populations.
Dieback on Eastern Hemlock due to Hemlock Woolly Adelgid.
A number of forest pests directly or indirectly affect the foliage on trees. Some pests eat or chew on the leaves or needles while other pests may injure parts of the tree which led to foliage dieback.
White, and Red Oak
Bronzing or browning of green leaves from the tips/margins toward the leaf base.
Destructivedisease that can kill oaks very rapidly.
Early detection and prompt removal of dead or dying trees. Avoid trimming, or cutting live oak trees during spring (May - June).
Oak wilt symptoms on red oak leaves.
Oak wilt defoliation.