Ladybugs, or lady beetles, are beneficial insects to gardners because they are predators of garden pests like aphids and spider mites. In other words, we want lady beetles in our gardens, but if you need to control them review our lady bug control information. The problem happens when adult beetles try to enter our homes in the fall with the purpose of sheltering there until spring.
Most lady beetles head for the hills in the fall to shelter in natural cavities. A new imported species, the multicolored Asian lady beetle, likes to spend winters at lower elevations, and our houses happen to be very handy. If they gain entry they can be a pest all winter. They do no direct harm but some believe they contribute to indoor allergies and they can be very messy.
It is important to prevent them from overwintering in your homes by spraying the exterior walls during the Fall months.
IDENTIFICATION OF LADYBUGS:
Adult Asian lady beetles are oval, convex, about 1/4-inch long, and pale yellow-orange to dark orange-red.
Although general body shape is usually similar, there are differences in size and coloration between ladybug species, although in the United States they are usually red or orange with black markings.
Since ladybugs are tree-dwelling insects, homes and buildings in forested areas are especially prone to infestation. Suburban and landscaped industrial settings adjacent to wooded areas also have large asian beetle aggregations.
Asian lady beetles (LadyBugs) congregate in large
numbers during the late fall rather than disperse to over winter individually
under bark or in leaf litter, as do most lady beetles.
Recommended Ladybug Control Measures:
PREVENTION, is the best of all control methods. Use a fast-acting synthetic pyrethroid such as D-Fense SC or Demon WP, to help prevent asian lady beetles, cluster flies, box elder bugs and similar pests from entering your home in the fall. For best results spray in the fall and spring on the south and southwest exposure of the house. Spray the exterior walls from the ground up as high as you can go.
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.
Recommended Products: Residual Insecticides, Aerosols, Dusts
Cyper WSP is an odor less product just like D-Fense SC, but will leave a visible residue seen against dark surfaces
Spray with the residual insecticides around eaves, attic
vents, windows, doors, under-fascia lips, soffits, siding(including under
lips) and any other possible points of entry, concentrating on the south
and the southwest sides .
In addition to the residual insecticides Bifen IT, Cyonara 9.7, and Suspend SC listed above you may want to use dusts and aerosols, if they have invaded the home.
D-Fense Dust can be used to treat wall voids if there is no insulation
to impede the spreading of the dust.
The dust and aerosols should be applied to indoor cracks, crevices, wall voids, hiding places and entry points.
CB 80 aerosol contains pyrethrums, which is a contact killer.