Drilling is all they’re doing. That being said, in my experience. But don’t forget that carpenter bees aren’t eating any of the wood.
Wooden step ladder home depot
Wooden handle metal spatula
Old wooden wheelbarrow images
Do Carpenter Bees Eat Wood? INSECT COP
But remember, carpenter bees aren’t eating the wood.
I’ve seen plenty of nests located in pressure treated lumber so whatever is being injected does not seem to slow them down or kill them.
They’re only drilling through it.
