How To Prevent Ladybug Problem

How To Prevent LadybugsCaulking exterior cracks and crevices is the best way to keep ladybugs out. This will also keep out other unwanted insects such as wasps and will save homeowners money on energy costs. The time to do this is in late spring or summer, before the adults begin searching for overwintering sites. During late winter or early spring, barrier treatments are ineffective since the beetles gained entry the previous autumn. While sealing cracks and openings is a more permanent way to limit beetle entry, the approach is time-consuming and sometimes impractical. There can be countless cracks associated with eaves, siding, vents, windows, doors, soffits, fascia boards, utility pipes and wires where insects can enter. On multi-story buildings, sealing becomes even more difficult. Gaps of 1/8″ or less will permit entry of lady beetles and other insects. Some homeowners may find it more practical to hire a pest control firm, building contractor or painter to perform these services.

Multicolored Asian lady beetles are attracted to lighter colors: whites, grays, and yellows. So, light-colored houses, especially those that are illuminated by the sun (typically the south or southwest side), or those situated on hillsides in forested areas, serve as “homing beacons.”

Unfortunately, there is no “quick fix” or easy answer to annual lady beetle invasions. Vacuuming, pest proofing and properly timed exterior insecticide treatments can provide relief but will not prevent entry of every single beetle.

Some of the beetles will die when temperatures drop below freezing. But that doesn’t help if they have already taken up residence inside buildings and other protected locations, especially if adequate moisture or humidity is available. Sweeping and vacuuming are effective methods for removing these lady beetles from living areas. If you later wish to release the beetles outdoors, place a handkerchief between the vacuum hose and the dust collection bag to act as a trap. A broom can also be used, but is more likely to result in staining when beetles emit their yellowish defensive secretion. Light traps can be useful for capturing flies and lady beetles in dark confined spaces such as attics, but will capture relatively few beetles entering living spaces in the fall or emerging from hidden locations the following spring.

Using insecticides indoors for control of the lady beetles is not typically recommended unless the infestation is very heavy, and professional pest control advice should be sought. If lady beetles are a perennial problem, owners may want to hire a professional pest control firm. Many companies apply insecticides to building exteriors in the fall, which helps prevent pest entry. Fast-acting residual insecticides can be sprayed in a targeted band around windows, doors, eaves, soffits, attic vents, and other likely points of entry.

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How to Prevent Ladybugs From Becoming a Problem in Your Home