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Honeylocust D-shaped Holes (IL)

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From: Jim Arnold
Beecher, IL
What are the "D" shaped holes we are beginning to encounter in dead and dying honeylocust trees? It seems to be an increasing occurrence in the locust trees we deadwood or remove.

Thank you.

Extension Message
From: Jay Hayek
Extension Specialist, Forestry
Department of Natural Resources and Environmental Sciences
Hi Jim:

Based on your description, it appears to be some type of borer, possibly the honeylocust borer.

In order to be more diagnostic, you'll need to take some detailed pictures of emergence holes, galleries, and possibly some larvae.

Send them to Dr. Phil Nixon here on campus: http://cropsci.illinois.edu/directory/pnixon

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