This is to follow up my previous question on carpenter bees
I took your suggestion and ordered delta dust and a bellow bulb blower from your site. But I am not sure what liquid insecticide I should get. I have three candidates after some research on your side. Fenvastar EcoCap, Lambdastar 9.7% and suspend SC. As I said in the previous question, I want to make sure the liquid solution won't stain the tudor house's wood exterior which is painted brown color. And the product first and foremost is most effective on carpenter bees.
We recommend using Suspend SC for carpenter bees. The product is water-based and should not stain the exterior as long as it is not over-sprayed.