Bronze Birch Borer #755359 - Ask Extension


Bronze Birch Borer #755359

Asked June 10, 2021, 3:12 PM EDT

I have a birch tree in my backyard that appears to be infested by the BBB. I'm trying to understand how to confirm whether it is BBB that appears to be killing the tree and whether there is an intervention that might save the tree (what stage the tree is in and its chances for recovery if treated). I live in SE Portland/Laurelhurst and would love to save the involved tree if at all possible. I have been cutting off limbs as they die but, the damage continues to advance.

Multnomah County Oregon

Expert Response

The bronze birch borer has damaged many trees in our area. EM9189 is a publication from OSU Extension about the insect and options for your tree. This one from WSU includes useful photos as well.
If you choose to hire someone to make a site visit, we recommend using a certified arborist. The ISA has a search page here.
Jacki Dougan Replied June 10, 2021, 6:02 PM EDT

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