Recently, I was sent to a homeowner in Princeton, NJ who was having a problem with yellow jackets. It’s bad enough when you see these nasty stinging insects flying around outside your home, but here, it was even worse. They had made their way inside one of the downstairs rooms.
I needed to determine how they were gaining access inside the home, and start with an exterior perimeter inspection. I observed yellow jackets flying in and out of an opening in the siding. Yellow jackets are ground-nesters. They usually build nests inside cavities. Often, we find them in hidden locations such as rodent burrows, behind bark, or in hollowed-out stumps. They also make use of man-made structures and will build their nests attached to eaves, or like here, behind siding. Yellow jackets are strong, hardy insects that are powerful enough to chew through drywall and even plaster, so they can make their way from wall voids into the living areas of home, a frightening experience for any homeowner, to say the least. These yellow jackets were likely nesting up in a ceiling or in a wall void, and a mature nest can grow to be quite large with several thousand members. The little bit of good news was that, according to the homeowner, no one in the household was allergic to wasp stings. Nevertheless, yellow jackets are aggressive, territorial wasps. They often sting without provocation, and their stings pack a wallop. It was important to have this infestation resolved quickly.
I treated the opening with a highly effective dust that will be carried back by the foraging wasps to the nest, spreading throughout. The residual dust will continue to work for months, killing any emerging wasps. This hidden nest should be completely neutralized within a day, and this family will no longer have to worry about these stinging insects.