Wood boring insects have attacked my Maple Tree
A large section of one of my maple trees has been consumed by a wood boring insect. When I broke apart the infested section I found the following insect deep inside 1/4-3/8 inch diameter black bore tunnels. There are also several 1/8 to 1/4 inch bore holes in the bark in the infested area as well. Because of this trees location it is trimmed often and I am sure stress from trimming opened the door to the insects. I also have a smaller maple nearby that has not been stressed by trimming that seems to be falling prey as well as 1/4 of its crown seems to have died.
Can anyone identify this insect or recommend a treatment to give the tree a chance of surviving? The infestation occurred in a major branch off of the main trunk and I am concerned that there may be borers in the main trunk as well. This tree is about 40 years old.
Links to Pictures:
Here is a link that might be useful: Insect Picture