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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
Green Industry
Master Gardener
Privately Owned Campgrounds and Recreational Areas
State Parks and Reservoirs
Firewood Dealers
Wood Products Industry
Self Study Programs
Arrest that Pest and Other Educator Resources
Report a Suspected Infestation
EAB on YouTube
Symptoms of EAB on Ash Trees

If you suspect that EAB is in your ash trees, look for combinations of the following symptoms:

dieback of leaves

J. Ellis, Purdue University

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

vertical splits

C. Sadof, Purdue University

Vertical splits in the tree's bark.



d-shaped exit holes

J. Ellis, Purdue University

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.

S-shaped channels

J. Ellis, Purdue University

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




D. Cappaert, MSU

Heavy woodpecker activity that is especially noticeable during winter months

water sprouts

J. Ellis, Purdue University

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



D. Cappaert, MSU

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


Other Problems Of Ash Trees

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