Ash tree save/treat?

Asked May 13, 2018, 12:05 PM EDT

I have a mature ash tree with lower limbs damaged by the emerald ash borer (D-shapped exit holes). The crown still looks good. I started treating the tree two years ago with Bonide Annual Tree and Shrub Insect control (~1.5% Imidacloprid) root drench. I would like to save the tree. I want to have the obviously dead limbs removed and the tree treated by injection if possible. Recommendations on this course of action and who should I contact for the the work? Tree has a trunk ~ 21/2 feet in diameter and is about 60 feet high.

Howard County Maryland emerald ash borer invasives ash tree dying tree emerald ash borer treatment ash tree worth treating

1 Response

It looks like this tree has already lost much of its canopy and a lot of the rest is thinning, on the way to dying. Ashes don't recover well with over 10% canopy loss, so we can't recommend treatment.
Please read through our webpage on EAB and particularly the links which deal with treatment and deciding whether to treat or remove trees: https://extension.umd.edu/hgic/invasives/emerald-ash-borer

ECN