Knowledgebase
Boxelder bug takeover #937049
Asked June 28, 2026, 9:52 AM EDT
Wayne County Michigan
Expert Response
Outside, I would use an insecticidal soap to kill them per the Illinois article below. Insecticidal soap kills by contact so you may need to spray daily to reduce the #s of them. Inside, vacuum them up and dispose of them. More info in the links below:
https://www.canr.msu.edu/resources/boxelder-bug
https://extension.illinois.edu/blogs/ilriverhort/2016-10-15-boxelder-bugs
https://extension.umn.edu/nuisance-insects/boxelder-bugs
http://www.npic.orst.edu/pest/boxelder.html
https://cals.cornell.edu/integrated-pest-management/outreach-education/whats-bugging-you/boxelder-bugs