How to Get Rid of Ladybugs in Windows

Getting rid of ladybugs in windows can take some time.

Ladybugs are great for a garden, because they get rid of destructive pests such as aphids and mites. But when these polka-dotted insects try to get into the house, they aren't usually so welcomed. Ladybugs are tree dwelling creatures, so homes in forested areas are particularly vulnerable to infestation. The window is a common way that ladybugs try to get into your house, and prevention is more effective than treatment.

Things You'll Need

• Shop vacuum
• Caulk
• Pest control product with bifenthrin for prevention
• Pest control product with cypermethrin for treatment
• Bug glue pads

Instructions

1. Raise the sash of the window that is infested and suck up all the ladybugs, dead or alive, with the shop vacuum. Repeat this step on all the infested windows. The vacuum is the most effective tool to use once infestation is present. If you wish to release the ladybugs unharmed, use a clean filter on the shop vac or purchase a special bug vacuum that sucks the bugs up without killing them. If you go this route (the smaller bug vac), expect it to take a long time. Release the ladybugs at least 10 miles away from your house.

2. Place a bug glue trap on each windowsill before closing it. The trap should rest between the window and the screen. It will attract and kill new lady bugs that might try to come in through the same window. Replace the traps as necessary.

3. Use caulk to seal any open areas or gaps around the window where the infestation occurred. If the screen has holes or doesn't make a tight seal with the window, replace it with one that does. Repeat this step for each infested window.

4. Spray a product containing the chemical cypermethrin on the area where the ladybugs are. This poison will kill them on contact. You can vacuum them up after you kill them. For prevention, spray a product containing the chemical bifenthrin around the windows in late summer or early fall. This will discourage the ladybugs from entering the windows and does not have an odor.

5. Treat the south and southwest exposures of your home with a bifenthrin product every year. Eventually, the ladybugs will stop returning and will look for another place to nest for the winter.

Tips & Warnings

• Ladybugs are attracted to light-colored houses and homes with southwestern sun exposure.

• Most infestations occur in the fall, when the ladybugs seek shelter for the coming cold weather.

• Bifenthrin and cypermethrin are dangerous, poisonous substances, so use with care, especially in homes where children and domestic animals reside.

References

• Do Your Own Pest Control: Ladybugs and Asian Beetles

Resources

• The Frugal Life: Ladybugs