Clover mites are accidental invaders that can be a nuisance during the early spring and occasionally in the fall. They are very small, reddish-brown creatures that appear only as moving dark spots to the naked eye. Sheer numbers, plus the resulting red-brown stain left behind if they are crushed, make them unwelcome visitors. The red stains are not blood, they are the mite's body pigments. Clover mites are not blood feeders and will not harm people or pets, nor will they infest household products. Once inside a home or building they will soon die.
As the name implies, clover mites feed on clover and grasses. They can be especially abundant in the heavy, succulent growth of well-fertilized lawns. Clover mites usually enter a home around windows or doors so they are usually seen crawling along sills or thresholds. Clover mites can crawl up outside walls and may enter the buildings at upper levels. Clover mite invasions can be greatly reduced by eliminating vegetation in an 18- to 24- inch band around the structure.
Clover mites are a temporary nuisance; they appear suddenly and then are gone. A soapy rag or wet sponge can be used to clean mites off of surfaces. Wipe carefully to avoid crushing the mites and causing stains. The crevice tool of a vacuum cleaner may also be used to pick up mites. Rely on non-chemical control indoors. Do not apply insecticides to kitchen counters or other interior surfaces.