10/06/2026
๐ The Ladybug That Wasn't Supposed to Be a Problem
Did you know some of the ladybugs you see around your home aren't actually native to North America? The multicolored Asian lady beetle was introduced to the United States beginning as early as 1916 because scientists hoped it would help farmers naturally control aphids, scale insects and other crop pests. And it workedโbut there was an unexpected downside.
By the late 1980s, Asian lady beetles had established wild populations and began spreading rapidly. They're extremely adaptable, reproduce quickly and eat large numbers of insects. Unfortunately, that also means they can compete with native ladybug species for food and habitat. Today, they're considered an invasive species in many areas.
You may notice them most in fall, when they look for protected places to spend the winter. They can gather around light-colored homes and squeeze through small cracks and openings. They don't damage the structure like termites or carpenter ants, but they can become a nuisance when large numbers make their way inside. When crushed or disturbed, they can also release a yellowish, unpleasant-smelling fluid that may stain walls and fabrics.
The Asian lady beetle is a fascinating example of how an attempt to solve one problem can sometimes create another. If you're seeing large numbers of these beetles around your home this fall, prevention starts outside. Sealing cracks, gaps and other potential entry points before they find their way indoors can help keep them out. ๐
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