we have a pine log home built about 2 years ago…I believe we have powder post bugs ( deep holes with sawdust under them..black bug with yellowish stripe that flies..i think ). our exterminator gave us this ”KILL ALL” solution that we pump into the holes when we notice them. lots of holes last year,.. much less this year. we also spray the exterior of the home every few months with this stuff..we cut down the trees touching the house to try and help with this too..the home is treated and sealed