[Stocker]

I have had lots of carpenter bees most years, strangely very few this year. They mostly chew into cedar; I've never seen traps like that before and I wonder if they might be more effective if they were made with cedar?

The bees are tough -- I have used an electric flyswatter on them, knocked them down in a shower of sparks, and watched them get up & fly away. I have also sprayed them with sticky bicycle chain lube in their holes. It works sometimes.