Asked June 21, 2021, 4:59 PM EDT
Oakland County Michigan
These are the immature life stage (nymphs) of boxelder bugs. These insects sometimes cause moderate damage when they aggregate and feed. The problem should go away within 1-2 weeks, and they are unlikely to completely strip leaves of foliage. Any chemicals that control boxelders would be broad spectrum insecticides with an active ingredient of bifenthrin, cyfluthrin, or lambda cyhalothrin. I would not recommend spraying this insect outdoors, as the insecticide would also affect any other insects (including beneficials) in the applied area.