I've got a bunch eating holes in my deck structure. I've built a trap, but none have ever gone in it. I'd rather avoid sprays. I've read I could spray the holes with a lemon juice concentrate. I posted a picture of the trap I go through but it doesn't really work.
I use traps in combination with spraying their holes. Is that trap in your picture solid wood?
The traps kind of work for me. I made 5 and hung them up. Some are full of bees, and others are empty. Not sure if that's because of how I made them, or the location...
Also I've heard that if you put a dead bee in your trap, it'll attract others. Not sure how true that is though.