How to bumout and discourage carpenter bees. Cover their nesting tunnel holes with duct tape. Here's how:
Now wait for the diligent little sucker to start trying to 'break out' because he/she thinks "heck it's just thin cloth. Voila"! Eventually, it's little white nose will poke through a small hole in the thick sticky wall. Then it will probably, foolishly try to squeeze its body out when the hole is just barely large enough.
There's a "sticky" little problem here because it's hairy torso will become hopelessly glued in the tape's tough adhesive and here it will probably remain till death, unable to get out or back into the tunnel again. (This will be a nano-trophy-for the vindictive!)
However, if you're in a hurry and don't need any nano trophies. When you see there's a hole started in the tape - just peel your tape up, move it over an inch and stick it down once again. This forces the poor little critter to start clawing at the stinky, powerful adhesive wall all over again. Soon you'll notice bees moving away from places of human activity (such as your deck railing)! :)
Does anyone know what to do to get rid of wood bees that bore into the rafters of outbuildings?
How can I keep wood bees from drilling holes in the rafters on my deck?
What type bee spray can I use on wood bees that would kill them?