Q: Where Do Asian Lady Beetles Come From?
A: We have our own native lady beetles that are typically solitary, red in color with small round, black spots. In recent years, we have been invaded by Asian lady beetles. They are brownish-orange to reddish-orange in color, with larger, irregular black or brown spots. You may find these beetles hanging out in large groups. More specifically, lady beetles live and feed on the foliage on trees and in the shrubbery around your home all spring and summer.
Q: Are Asian Lady Beetles Harmful To Humans & Can They Bite?
A: Lady beetles are considered to be a beneficial insect because they feed on aphids, which can damage crops. Native lady beetles are not harmful. Asian lady beetles, due to their large numbers, can be considered a nuisance insect. Neither species can do damage to a home, and they do not sting or bite. However, when crushed, they will emit a yellowish liquid that will stain the surface, where crushed. Gross!
Q: Can Asian Lady Beetles Harm My Shrubbery?
A: Asian lady beetles have chewing mouthparts, and they feed on small insects, leaves, and tender shoots. They can do extensive damage to shrubbery and foliage when in large numbers and when there is not enough insects to feed on.
Q: What Do Asian Lady Beetles Feed On Inside My House?
A: Asian lady beetles live on fat stores during the winter if their preferred foods are unavailable. On very cold days, they go dormant but revive on warmer days. Once inside a home, they are warm and move around, and usually are attracted to light from windows. They typically will congregate on windows and die.
Q: How Do You Get Rid Of Asian Lady Beetles?
A: Exclusion and treatment. Exclusion consists of sealing all cracks and possible entry points in and around your home.
Asian lady beetles are attracted to light colored homes, and typically are worse in homes in higher elevations, such as homes on ridges or mountains. Sealing around eaves and overhangs, around windows and doors, cracks under siding, and any other openings will help keep them out.
An exterior mist treatment on the siding of your home and the shrubbery surrounding your home will typically repel and eliminate them before they can enter. Once inside they are hard to eliminate. They enter wall voids and the attic where they go dormant on cold days. When it warms slightly, they awaken and may enter the living space of your home. The best and most cost effective solution is to vacuum them up as they appear and make sure you exclude and treat next fall before they enter.