I have a cedar cabin so the bees don't bother it but they have destroyed all the trim pieces. I don't know what they are made of but looks like it's been hit with buck shot. I'm only there 2 or 3 weekends a month so I need something I can apply and get rid of them. Any suggestions?
Where in 3c is your cabin? I've got some home remidies I have never tried but have had friends use with some success. Every year I get out a badmitten racket and spent a day or two cleaning them out. It really hurts the population and they don't seem to come back as strong the next year.
There is a white powder that you can find at a Lowes etc. that comes in a bottle with a tapered end. It's specifically for carpenter bees. You squeeze it in the hole and it lasts weeks if not longer. The bees walk through it, go inside and kill the females/nests.
I used it on my garage this year and has worked like a charm. I went from seeing a million of them, to barely ever seeing them at all.
Every spring I have a professional exterminator come out to camp and spray the entire external wood siding. I have had issues with carpenter bees as well as wasps. An annual treatment keeps things under control. A single treatment is about $130.