Vespula germanica
Yellow jackets are the most aggressive stinging insects in Wisconsin, often nesting underground or in wall voids. In Waukesha County, colonies can exceed 5,000 workers by late summer. They're attracted to sugary foods and proteins, making outdoor events particularly risky from July through October. Ground nests are especially dangerous as they're easily disturbed by mowing.
Yellow jacket colonies in Waukesha County peak at thousands of workers by September. As natural food sources decline in fall, they become desperate and aggressive around human food sources. This is the most dangerous time for encounters.
Our technicians use professional-grade treatments applied directly to the nest entrance, typically at dusk when all workers have returned. The area is secured and monitored. Never pour gasoline or water into ground nests.
Don't wait when safety is at risk. PIP's emergency team responds same-day across Waukesha County.
Call Now: (262) 893-5271