Should I keep treating my Ash Trees? - Ask Extension
We have treated our 2 ash trees twice, so over 4 years. We are due for another treatment but I see bark falling off in the upper canopy and we had a l...
Knowledgebase
Should I keep treating my Ash Trees? #864873
Asked April 17, 2024, 2:04 PM EDT
We have treated our 2 ash trees twice, so over 4 years. We are due for another treatment but I see bark falling off in the upper canopy and we had a lot of sucker growth last year. There was dome thinning og the canopues as well. We are being told they can still be saved but that goes against what I learned in landscape horticulture school. Can you please advise on if they're worth treating.
Dakota County Minnesota
Expert Response
I don't see obvious evidence of emerald ash borer (EAB). But I can't diagnose from a few photos. It's your decision on how to proceed. First, I'd read these discussions about when to save an ash tree:
https://extension.umn.edu/tree-and-shrub-insects/emerald-ash-borer#should-i-treat-my-ash-trees%3F-1472160
https://forestrynews.blogs.govdelivery.com/2022/03/15/protect-your-valuable-ash-trees-against-emerald-ash-borer/
Second, I'd have a certified arborist look at your tree to assess its value and prognosis:
https://www.treesaregood.org/findanarborist/arboristsearch
https://extension.umn.edu/tree-and-shrub-insects/emerald-ash-borer#should-i-treat-my-ash-trees%3F-1472160
https://forestrynews.blogs.govdelivery.com/2022/03/15/protect-your-valuable-ash-trees-against-emerald-ash-borer/
Second, I'd have a certified arborist look at your tree to assess its value and prognosis:
https://www.treesaregood.org/findanarborist/arboristsearch
