Ash tree bore infestation
My neighbor just had her ash tree cut down due to die back caused by the ash bore. The ash tree in both my front yard and my other neighbors yard are showing significant die back as well. Is it too late for our trees to be saved at this stage of infestation? We live in the Rockville, MD area and I personally would like to do what is possible to save this tree not only for it’s beauty but also for the heating and cooling benefits it has provided us. Looking forward to your response. Best,
Montgomery County Maryland
Once an ash tree has significant dieback, it's too late to help them. That includes if the tree has more than half it's leaves missing, or has many other signs of emerald ash borer infestation.
Here is a decision guide to help you to determine if it's worth trying to save: https://extension.entm.purdue.edu/EAB/PDF/NABB_DecisionGuide.pdf
If it's fall would threaten people or property, it's better to remove them sooner rather than later as the wood is weak and some tree companies aren't willing to have workers climb them if they've been dead for a while.
Here is our page on Emerald Ash Borer, with many helpful links: http://www.extension.umd.edu/hgic/invasives/emerald-ash-borer