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	Ladybugs

Ladybird Beetles (Ladybugs)
by Dennis Ferraro Extension Educator Douglas/Sarpy Extension Unit

 Several of the common species of lady beetles (ladybugs, if you prefer) found in Nebraska will wander indoors during the fall. However, this is a distinctive and annoying trait of the Asian Lady beetle, a relatively new species imported to the United States from eastern Asia. The "multicolored Asian lady beetle" has become common in many areas of the eastern United States and Nebraska. This ladybug is used as natural control and therefore a beneficial inhabitant of the landscape. They can also be a serious household pest in those areas where they have become well established and abundant. Asian lady beetles, like boxelder bugs, pine seed bugs and elm leaf beetles, are accidental invaders: that is, "outdoor" insects that create a nuisance by wandering indoors during a limited portion of their life cycle. Accidental invaders do not feed or reproduce indoors. They cannot attack the house structure, furniture, or fabric. They cannot sting or carry disease. Lady beetles do not feed on people through they infrequently pinch exposed skin. Lady beetles may leave a slimy smear and they have a distinct odor when squashed. As with other accidental invaders, the most effective management option is to prevent invasion by sealing cracks, gaps and openings on the outside before the beetles wander in during late summer. Application of synthetic pyrethroid insecticides such as permethrin to the outside of the buildings may prevent pest entry. Treatment must be applied before the beetles begin to enter buildings to be effective (mid- to late October). Homeowner insecticides other than permethrin usually do not provide satisfactory prevention.