Charles H. Bronson, Commissioner    -    James R. Karels, Director

Signs and Symptoms of Emerald Ash Borer (EAB)

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.

A

vertical splits in bark

Photo: Deborah McCullough,
Michigan St. Univ. http://www.na.fs.fed.us

B

crown and branch dieback

Photo: James Smith,
USDA APHIS PPQ http://www.forestryimages.org

C

Epicormic sprouting on the trunk

Photo: James Smith,
USDA APHIS PPQ http://www.forestryimages.org

D

Epicormic sprouting on trunk 2

Photo: David Cappaert,
Michigan St. Univ. http://www.forestryimages.org

E

woodpecker damage

Photo: David Roberts,
Michigan St. Univ. http://www.msue.msu.edu

F

sparse or discolored foliage

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
Division of Forestry Shield
Florida Department of Agriculture and Consumer Services
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