Knowledgebase

I believe my Ash Tree has Emerald Ash Borer #395626

Asked April 24, 2017, 2:05 PM EDT

Greetings, I have a good size ash tree which is my favorite. This spring, it appears that the majority of the tree did not bud or grow leaves and looks dead. There are some new green shoots though coming off some of these branches, but they are sparse. There are also some apparent pieces or bark coming off. In talking with some people and doing some research online, it does appear that it could be an Emerald Tree borer. Do you know of anyone locally that would be able to look at my tree and tell me for sure, as well as what options I might have to treat it, if that is the best option. I would hate to lose this tree, but also don't know enough about trees to know if it is too far gone. Any assistance or contacts that you might have would be much appreciated. Thank you.

York County Pennsylvania

Expert Response

Emerald ash borer move into an area as adults and feed on ash leaves. The adults lay eggs and the larvae bore into the tree and feed on the sap. They make characteristic D shaped holes with sawdust visible in their wake.
Here is a link to the website of the International Society of Arboriculture. They have a zip code search that will locate a licensed arborist in your area. That is the surest way to get a professional evaluation. Once the larvae infest the tree, there isn't much that can be done.
Here is a link to a USDA pest alert about the emerald ash borer.
An Ask Extension Expert Replied April 24, 2017, 6:49 PM EDT

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