Blue/Black wasp under our pool deck. How do I get rid of them when I can't see the nest?
So we have an inground pool with a wooden wrap around deck. These humongous black wasps with a bluish sheen fly around and are everywhere out there. We see them carrying grasshoppers and taking them between the wooden slats under the deck. We abandoned our pool early in the season because they are very aggressive. Obviously if we are out there we are swimming, walking on the deck, jumping, playing music and what not. This appears to annoy them. I cannot see any nests but there must be several down there because they go in all over the place. Help. What can I do to get rid of them so they don't come back next year?