Multicolored Asian lady beetles congregate in huge numbers. But did I mention that they congregate in huge numbers clogging up window screens, making life unpleasant, and some smell horribly when you squash them? Outdoors, this makes them less palatable to predators, but indoors, it can stain surfaces or excite allergic reactions. Its scientific name Harmonia axyridis, is a lot like lady beetles native to North America. The most significant difference between them is that while North American ladybugs spend the winter outdoors, Asian lady beetles have evolved to hibernate in light-colored cliffs in their native East Asian habitat. Transplanted here—intentionally by agricultural scientists as more aggressive aphid-eaters than our native lady beetles, and accidentally in the course of global commerce—Asian lady beetles are drawn to overwinter in buildings instead.
How To Get Rid of Asian Lady Beetles | Environmental Pest Control
Alright, does anyone have these little insects crawling around their home right now? I do, I took the picture below earlier today. One might think that these are cute little ladybugs, but with a closer look, they will see that they are actually Asian lady beetles. Asian lady beetles are quite different then ladybugs and can quickly invade a home if they are not dealt with quickly. Here are a few signs that you actually have Asian lady beetles instead of ladybugs. Getting rid of lady beetles can be somewhat challenging.
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. While indoors, the pests search for moisture or humidity and bask in warm portions of the building when possible. Houses near woods or fields are prone to infestation, although any building can attract the pests.
Once ladybugs have become established in the home, the treatment options are limited. The easiest way to remove ladybugs, once they are indoors, is with a vacuum cleaner. D-fense SC with deltamethrin is a long residual insecticide and does not break down easily outside on wall surfaces. It is odorless and does not leave a stain.