Sarah from Andover, Mn writes
We had a huge paper wasp infestation underneath the crevices of our deck last summer/fall. We endured it until the first hard frost when they all died, and then we went in and scraped out all the little nests they made throughout the summer. Wanting to do a preventative spray to prevent nests this coming summer.
Demon WP would be a good option for you. This is a wettable powder that you mix with water and apply using a hand pump sprayer. It works great for flying insects like wasps. You can spray the underside of the deck with the mixed solution. This will not repel the wasps, but when they land on the surface they should pick up the product and die within a few hours. Demon WP can also be used as a perimeter spray around the house. You may also want to take a look at our article on How to Get Rid of Wasps for more information on treating and preventing wasps.
Answer last updated on: 04/25/2017
