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EAB for Homeowners
Identification & Biology
EAB Locations
EAB Management
Protecting Ash Trees with Insecticides
Quarantine Information
Information for Industries and Organizations
Self Study Programs
Arrest that Pest and Other Educator Resources
Report a Suspected Infestation
EAB on YouTube
Symptoms of EAB on Ash Trees

Look for a combination of these symptoms on your trees:

dieback of leaves

Dieback of leaves that begins in the upper third of the tree and progresses downward over time.

(J. Ellis, Purdue University)

vertical splits

Vertical splits in the tree's bark.

(C. Sadof, Purdue University)



d-shaped exit holes

D-shaped exit holes that are only 1/8 inch wide found in the tree’s bark on the limbs and trunk, the result of the emergence of newly formed adults.

(J. Ellis, Purdue University)

S-shaped channels

S-shaped channels found under the tree’s bark caused by larval feeding.

(J. Ellis, Purdue University)




Heavy woodpecker activity that is especially noticeable during winter months

(D. Cappaert, MSU)

water sprouts

Water sprouts (epicormic shoots) that appear at the tree's trunk.

(J. Ellis, Purdue University)



Worm-like larvae (immatures) found under the tree’s bark that can grow up to 1-inch long.

(D. Cappaert, MSU)

If you see these symptoms, and EAB has not yet been found in your county, please call the Indiana DNR hotline at:


Reports of suspected EAB finds in uninfested areas of the state help the DNR keep track of the beetle's location. Your personal information will not be made public.

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