Problem With Japanese Maple

Question

I’ve discovered what appears to be sawdust on my Japanese Maple plus evidence of tunneling through bark. I’ve attached a photo that indicates what I’m talking about. Any ideas on how I could treat this?

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Answer 1

Uh oh, it looks like borers. They can damage entire limbs or even kill the whole tree. They are hard to manage because they are inside the tree. Here is more:

https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maple-problems.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-borer-insects.htm