The following signs and symptoms are general, but may indicate an EAB infestation: "D-shaped" adult exit holes 3-4 mm wide on the bark (A), vertical splits in the bark (B), crown and branch dieback (C, D), Epicormic sprouting on the trunk (E), woodpecker damage (F), and sparse or discolored foliage.

Signs and Symptoms of Emerald Ash Borer (EAB)

A	B
Photo: James Smith,  USDA APHIS PPQ  http://www.forestryimages.org	Photo: James Smith,   USDA APHIS PPQ  http://www.forestryimages.org
C	D
Photo: David Cappaert,   Michigan St. Univ.  http://www.forestryimages.org	Photo: David Roberts,   Michigan St. Univ.  https://www.canr.msu.edu/outreach/
E
Photo: David Cappaert,   Michigan St. Univ.  http://www.forestryimages.org

Reference: McCullough, D.G. and S.A. Katovich. 2004. Pest Alert: Emerald Ash Borer. NA-PR-02-04. USDA For. Serv., St. and Priv. For., NE Area, Newtown Square, PA