Emerald ash borer can be confused with many native insects. Check out these native look-alikes.
In Vermont, we have three species of ash trees: green ash (Fraxinus pennsylvanica), black ash (Fraxinus nigra), and white ash (Fraxinus americana). Here are some helpful links for ash tree identification:
Emerald ash borer (EAB), Agrilus planipennis, is an exotic beetle that was discovered in southeastern Michigan near Detroit in the summer of 2002. The larvae feed in the cambium between the bark and wood, producing S-shaped galleries that girdle and kill branches and trees. Emerald ash borer probably arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia.
The EAB generally has a one-year life cycle and goes through complete metamorphosis.
Adults lay eggs on the bark of the trunk or branches in the summer.
Eggs hatch in 7-10 days.
Larvae do their damage to the tree by tunneling in the inner bark and outer wood. This kills the tree by interrupting the flow of food and water. Galleries widen as larvae mature.
Pre-pupae larvae overwinter in shallow chambers in the outer sapwood or in the bark of thick-barked trees.
Pupation begins in late April or May. Adult emergence begins in late May or June.
Adults chew D-shaped exit holes are 3-4 mm wide.
Adult EAB feed along the margins of leaves, leaving small, irregular shaped edges.
5% of Vermont's trees are ash. The majority of ash trees infested with emerald ash borer will die. The emerald ash borer poses a threat to Vermont's economy and ecology. It spreads very quickly, is difficult to detect, and eradication is not expected.
Taylor Scarr, Ontario Ministry of Natural Resources, Bugwood.org
Art Wagner, USDA - APHIS, Bugwood.org
David Cappaert, Michigan State University, Bugwood.org
Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, Bugwood.org
USDA Forest Service - Northeastern Area, USDA Forest Service. Bugwood.org
Pennsylvania Department of Conservation and Natural Resources- Forestry, Bugwood.org