Clover mites most often originate in turfgrass stands that are relatively young (2 – 5 yrs old), well maintained and fertilized. During the late winter and again in the fall time, these mites seem to migrate in large numbers and often end up inside structures, including homes. Clover mites are small enough to squeeze through the tiniest of cracks and openings in buildings, making it nearly impossible to seal them out. Turfgass grown right up to and in direct contact with building foundations can also facilitate their entry into structures. Although they are harmless to humans and pets, the presence of large numbers of these mites inside structures can be unsettling and attempts to wipe or sweep them from light colored surfaces such as walls often smashes them, resulting in brown/red steaks that can be difficult to clean.The temporary application of double-sided tape around window sills can help stop migrating mites from gaining further access into affected structures, but once inside, these mites often become dehydrated rather quickly making vacuum cleaning of their tiny dead bodies one of the best options.
Chemical barrier treatments may be applied to the outside foundation perimeter (three feet high and three feet out). Soaps as well as pyrethroid insecticides have been shown to be effective IF applied during the times that the mites are on the move.Use of chemicals inside the home is not recommended. Remember that these mites do not directly damage the building nor do they bite people. Most consider them a simply a temporary nuisance pest and find that vacuuming or wiping them up with a soft sponge or wet cloth is sufficient. Be aware that they can smear and leave a red stain if crushed.