Q: Are carpenter bee traps worthwhile in capturing these insects?
A: From the reports I have gotten, results are not consistent, even using the same type trap. Some people catch a dozen bees, while others capture none. You are welcome to try one and see if it works but I don’t think you’ll notice fewer bees. As they say in the automobile ads, your mileage may vary. I have plans at http://www.walterreeves.com/gardening-q-and-a/carpenter-bee-build-your-own-trap/.