By Scout Nelson
Researchers and educators with the University of Minnesota Extension are addressing common misconceptions about the multicolored Asian lady beetle, an insect that often appears around homes during the fall. While these beetles can become a nuisance when seeking winter shelter, experts say several popular beliefs about them are inaccurate.
According to Claire LaCanne, Anthony Hanson, and Eric Yu, the multicolored Asian lady beetle is a non-native species that commonly gathers on buildings and enters homes through small openings as temperatures drop. Despite being unwelcome indoors, the insects provide benefits by feeding on agricultural pests.
One common misunderstanding is that Asian lady beetles are different from ladybugs. Extension specialists explained that the multicolored Asian lady beetle is a member of the ladybug family, and the terms "ladybug" and "lady beetle" are often used interchangeably in the United States.
Another myth involves the beetle's history in Minnesota. Experts noted that the species was not intentionally released in the state to control soybean aphids. Instead, it was originally introduced in California in 1916 for biological control and later spread naturally into Minnesota and other Midwestern states.
The article also addressed misconceptions about identification. Researchers explained that color and spot patterns vary widely, with beetles appearing in shades of orange, yellow, red, or black. The black "M"-shaped marking behind the head is generally considered the most reliable identifying feature.
Extension specialists also clarified that lady beetles do not typically reproduce inside homes. They enter buildings to survive winter conditions and lay eggs outdoors where larvae have access to insect prey and food sources.
The experts emphasized that multicolored Asian lady beetles contribute to natural pest control by feeding on soybean aphids and other soft-bodied insects. Their presence can help support integrated pest management efforts in agricultural settings.
For homeowners, the primary concern is preventing beetles from entering structures during the fall. University of Minnesota Extension recommends sealing cracks, gaps, and other entry points to help reduce indoor infestations.
Photo Credit: pexels-amber-shadow
Categories: Minnesota, Crops, Soybeans