Alpine WSG Insecticide. Lady bugs surrounding and invading your home by the thousands? It's not lady bugs, it probably the Multi-Colored Asian Lady beetle. The Multi-colored Asian lady beetle Harmonia axyridis are sometimes mistaken for ladybugs or lady bird beetles, and are familiar insects in many parts of the United States. For the most part, Asian lady beetles are beneficial predators that eat aphids, scale, insects, and many other pests that injure plants in gardens, landscapes and agricultural settings. However, in many places of the midwest and eastern USA, the Multi-colored Asian lady beetle has become a household pest.
As far as bugs go, ladybugs have a pretty sterling reputation. Seen as a sign of good luck, and often appearing in children's books and cartoons, these red- and black-spotted insects have plenty of great qualities: They prey on pests like aphids, spider mites, and mealy bugs that would otherwise destroy your plants and gardens. But, there's actually a bad kind of ladybug out there—ones that can bite and be aggressive, are harmful to dogs, invade your home, and leave behind a foul-smelling yellowish secretion that can stain walls and furniture. They're called Asian Lady Beetles and were first introduced to North America in to combat aphids—but now, they're even more of a problem because they have overtaken the native species, and our homes. While Asian Lady Beetles also prey on pests that harm our gardens, their cons far outweigh the pros. Here's exactly how to tell if you're dealing with a good kind of ladybug or a bad kind of ladybug, and what to do about it.
There are Actually ‘Bad’ Ladybugs, and You Need to Watch Out for Them
The insects commonly known as ladybugs or ladybirds , in the UK and other English-speaking nations include a number of species from the Coccinellidae family. Ladybugs are the subject of nursery rhymes and are considered a good luck symbol by many. For example, the seven-spot ladybird, the most common species in Europe, is said to represent the seven joys and seven sorrows. The ladybug is often considered a symbol of the Virgin Mary in Christian culture. Ladybugs are not true bugs, but rather a group of some 6, small beetles that share a similarity in markings—orange or scarlet shells with black spots.
Outdoors, Asian lady beetles helpfully feed on plant pests like aphids and many others. From September to November, they move indoors to overwinter, crawling along windows and walls. Small cracks around windows and door frames provide entry points.