I have read your articles and viewed the videos. The bees here have been active for about 1 week. The problem is that the area they are drilling in is not visible. I know where they are going in. The board that holds the little screens under the eves is separtaed from the board holding the gutters. There is about a 1/2 gap. What is the best way to treat?
If you review the post we made here on bees getting up under siding:
you’ll learn that “blind treating” is Okay when using a dust like DRIONE. As explained in our Drione Video , the unique qualities of this product enable it to float around and penetrate large areas. When applied to a gap like you’re describing, it will undoubtedly get to where it’s needed. By lightly covering all the surface area in the void, foraging bees will quickly pick up the dust and die. In most situations, they’ll be dead in less than a week.
After you’re sure all the activity has stopped, it would be wise to get this gap sealed to prevent bees (and other pests) from taking advantage of this vulnerable spot.
Here are direct links to the products and information mentioned above.