Bumble bees in wood–
What do you recommend to kill them?
The wood is a soft wood, notably, Atlantic White Cedar–aka, Juniper,
It’s most likely you have carpenter bees. You can read all about them in our Carpenter Bee Control ARTICLE. There you’ll find control methods listed. Basically you’ll need to dust their holes with drione and spray the wood with CYPERMETHRIN to prevent new nests from being drilled. The process is easy and well explained in the article.
Here are direct links to the products and information mentioned above:
Carpenter Bee Control: www.carpenterbees.com/carpenter-bee-control
Give us a call if you still have questions.