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Fall Invading Pests in the Home (09/01/16)

This time of year, as night temperatures drop and days get shorter, several insects, such as boxelder bugs, multicolored Asian lady beetles, strawberry root weevils and cluster flies, may invade the home.

Fall Invading Pests in the Home

This time of year, as night temperatures drop and days get shorter, several insects, such as boxelder bugs, multicolored Asian lady beetles, strawberry root weevils and cluster flies, may invade the home. These insects like to overwinter inside the home for warmth, often in the wall voids where temperatures are 40-50F. Unfortunately, they often end up inside the home walking around on floors, walls and ceilings where they become a major nuisance if they occur in large numbers. However, they are not harmful to people, pets or the house.

The best way to get rid of them inside the home is just vacuuming or physically removing them. On the outside of a home, figure out where they are getting inside the house, and caulk and seal or screen any entry points to prevent them from coming inside. Many insects only need a small crack like the ‘thickness of a credit card’ to get inside the home.                                                                                                                                                                                        

Fall invaders often congregate on the sunniest sides of the house - south and west sides. If populations are high, then a perimeter ‘barrier’ insecticide spray may be useful. Spray 3-5 feet out from the base of the house and up the siding of the house. Examples of insecticides labeled for outdoor use around home are: permethrin, synergized pyrethrins (Spectracide Bug Stop and other brands), pyrethroid insecticides (such as, esfenvalerate - Ortho Bug-B-Gon Garden & Landscape Insect Killer; lambda cyhalothrin – Spectracide; beta-cyfluthrin – Tempo), or carbaryl (Sevin). Please read, understand and follow the label - it’s the law.

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Janet J. Knodel

Extension Entomologist

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