Multi-colored Asian Lady Beetles InvadeWith increases in populations over the years, this non-native beetle has turned into a nuisance home invader in fall. We are learning more about this insect and an Extension entomologist shared some additional information. Beetles range in color from yellow to red and vary in the number of spots that occur on the wing covers. If the beetles are red, then they ate mostly aphids during the season, whereas if they tend toward orange and yellow, they fed on more pollen during the season. The number of spots relates to air temperature during development. Beetles tend to be attracted to older homes and those with light-colored siding; of course, most older homes afford more cracks and crevices for entry. Lady beetles can enter through an opening of only 1/8 of an inch. Once a house has been invaded, it's likely to be invaded again in following seasons. The beetles emit a pheromone (scent) that persists; they will return to homes with this pheromone scent. Prevention is the best way to control the beetles. Seal openings where pipes enter your home such as gas meters, faucets, and dryer vents. Caulk around doors, windows and chimneys. Repair tears in screens. Keep siding in good repair. Indoors vacuum up lady beetles. Indoor insecticides are not effective. |
