I recently notice small holes and some deterioration of a piece of wood in between rooms of our house.  Our house was built in late 1900's.  I had to companies come in to advise me and give a quote.  The first one said they can treat the beetle from the basement and will spray the bottom of the floor and will guarantee it for 18 months for $550.00.  The 2nd said there isn't much we can do about it since the wood is stained on the top of the floor and anything they would do would not penetrate and they didn't feel application from the basement would penetrate enough and be worth it.  I then Googled and came up with your site.  I guess my question is how do I know if I still have them? I know you show products, but if I already have an insecticide which is a systemic then can't I spray with that, like I did my living trees outside?

More on deterioration of wood floor from beetles?