Asian Lady Beetle & Stink Bug

Both Asian lady beetles and stink bugs can invade homes in large numbers during cooler months, becoming major indoor nuisances. While lady beetles help with aphid control outdoors, both species seek shelter indoors to overwinter, leading to infestations inside homes. Recommended treatment schedule is Late September and October. Once inside, treatment is not recommended.

Asian Lady Beetle Life Cycle & Behavior

Asian lady beetles complete their life cycle in 3-4 weeks, with multiple generations per year. Eggs are laid on the undersides of leaves of plants like ornamentals, roses, and soybeans. After 3-5 days, the eggs hatch, and larvae feed on aphids for 12-14 days before pupating into adults. Adults can live for over a year.

Stink Bug Behavior

Stink bugs, known for their distinct odor, enter homes in the fall seeking warmth and shelter. They gather around sunny, south- or southwest-facing walls and often crawl through cracks and crevices. They release a strong odor as a defense mechanism when disturbed.

Why They Enter Homes

Starting in October, both Asian lady beetles and stink bugs look for overwintering sites inside buildings. They are attracted to sunlight and can enter through small cracks and openings around windows, doors, and siding.

After Beetles & Stink Bugs Have Entered the Structure

Once inside wall voids or attics, both Asian lady beetles and stink bugs can be hard to control with insecticides. Killing beetles or stink bugs indoors can attract carpet beetles, which feed on the dead insects. Instead, focus on sealing the entry points to prevent them from emerging.

How to Manage an Indoor Infestation:

✔ Locate Entry Points – Check for cracks under baseboards, around window trim, exhaust fans, and ceiling lights.
✔ Seal Openings – Use caulk or tape to block cracks and prevent the pests from crawling out.