Much of east central Alabama has recently been invaded by a large number of lady bugs.  Not locusts or killer bees but cute little lady bugs.  However, the average homeowner will promptly say they are anything but cute; They are indeed a nusiance.  They also bite! Their swarming and entering of homes has received much attention from homowners and has lead to numerous calls to the local Extension office over the past week. 

The much recent colder weather and upcoming winter has triggered Asian lady bug beetles to seek out a warm place to live. To the dismay of homeowners, swarms of this species of ladybug typically targets and invades our warm and cozy homes in search for a comfortable place to overwinter.  One or few might be okay, but when you have tens to hundreds of ladybugs entering into and congregating inside the home, these good insects abruptly become nuisance pests.  Especially when they are not going to pay rent.

In Japan, Asian lady beetles overwinter in the cracks and crevices of mountain rocks. In the United States, they use buildings as protection from winter. The beetles begin to invade homes through cracks and crevices during the fall (around October or November in Alabama). People with log homes may find this beetle particularly troublesome due to the beetles' preference to dwell in cracks and crevices. Common overwintering sites include door and window frames, porches, underneath siding, roof shingles, wall voids, attics, and soffits.

Lady bug beetles seem to be attracted to light, reflective surfaces such as large windows, or light-colored walls and trim. Beetles usually are found on the sunniest areas of buildings. Homes in forested areas are prone to infestation because this beetle normally lives on trees. 

During the spring, as the temperature increases, so will beetle activity. Beetles overwintering in homes will now look for a way out. As they try to escape, beetles can be found along large glass windows and in light fixtures because they are attracted to light, and around doors, baseboards, and dropped ceilings.

Considering that ladybugs are beneficial insects that eat bad insects such as aphids, one might hesitate to not bother them. But they don't belong inside the house, especially in large numbers.  If you decide to get rid of them, forget about using insecticides.  Most are not labeled for indoors, nor are they very effective in this case. 

Prevention is the key to keeping ladybugs from getting into homes. Caulk cracks along windows, doors, or other portals of entry.  Seal and screen attic vents. Install tight fitting door sweeps. Seal utility openings (pipes, dryer vents, cable TV wiring ports, etc.) with caulk, steel wool, or other mesh. Remember, a space less than 1/8 inch will allow ladybugs entry.  This also give one an opportunity to weather proof your home for the winter. 

Once ladybugs get inside the home, use a vacuum to remove them or a broom to sweep them up. You can then discard them back outside.  Ladybugs will stain carpeting, wallpaper, upholstery, and bedding when crushed or disturbed.