Boxelder Bug Invasions: Prevention and Control

Boxelder bugs, like kudzu bugs and Asian lady beetles, congregate on sunny house walls in autumn seeking winter shelter. They exploit cracks to enter wall voids and sometimes indoor spaces. While harmless to humans, their sheer numbers create significant nuisance.

Management Strategy

Apply any labeled garden insecticide to congregating bugs in late summer or early fall, before they seek entry. Focus on exterior walls, foundation cracks, and window frames. Sealing entry points with caulk and weatherstripping provides longer-term exclusion. The bugs don't reproduce indoors—they're simply overwintering—so spring cleanup is straightforward.