We have yellow jackets building a nest in our side yard by the garage. We see...

Asked August 23, 2014, 10:50 AM EDT

We have yellow jackets building a nest in our side yard by the garage. We see them going into the ground, but have seen one go under the siding. We have moved the mulch and some of the dirt away from the house where we see them. We have sprayed the area several times with yellow jacket and hornet spray and have put seven powder on it also. They're still there. Is there anything we can buy to get rid of them? What do we need to do? Any help you can give us would be appreciated. Thank You, Tom Bell

Franklin County Ohio

1 Response

It sounds like part of the problem might be that the waps are in the structure in addition to the ground. I have excerpted a section of the Ohio Fact Sheet on Yellow Jackets, which discusses the treatment for both locations. However, in my experience if the nest is likely in an unknown location in a structure, it may be best to hire a professional, as they have specialized equipment and access to commercial chemicals that may be more effective.

"Nests Below Ground
Treat as soon as the sun begins to rise with insecicidal dusts. If using a flashlight, cover the lens with red cellophane paper since light will stimulate yellow jacket wasps to come out of their nests. Dusts should be puffed into the nest immediately followed by a shovelful of moist soil over the entrance hole to prevent escape. Do not cover the nest entrance during daylight treatment as returning workers may try to protect the immediate area looking for the entrance. Some prefer not to cover the entrance hole either during the day or evening.

Nests in Wall Voids
The German yellowjacket frequently builds nests in the walls of structures. Once locating the entrance, quickly insert the plastic wand of an aerosol generator and release 10 to 30 seconds of material into the void. Immediately move away and DO NOT plug the entrance as disturbed wasps may enter the house or building. Disturbed wasps may enter the building even when the entrance is not blocked, so be sure that occupants are well away from the treatment area. An alternative is injecting an insecticide dust (registered or wasp control) into the entrance. A commercial plastic hand duster is the best tool for this type of application. A veil, goggles, and protective clothing must be worn if done during daylight hours."Source: http://ohioline.osu.edu/hyg-fact/2000/pdf/2075.pdf