Clover mite
The clover mite (*Bryobia praetiosa*) is a tiny plant-feeding mite that is a nuisance pest when it enters homes in large numbers.
The clover mite (Bryobia praetiosa) is a tiny plant-feeding mite that is a nuisance pest when it enters homes in large numbers. It does not bite humans or pets, does not transmit disease, and can leave red stains when crushed. In Canada, it is a common nuisance pest in homes and lawns, and pest-control guidance notes that it is not structurally damaging but can invade in large numbers and stain surfaces when crushed.
Description
Clover mites are tiny, oval-bodied arachnids with long front legs that can appear antenna-like. Adults are usually reddish-brown, and their small size makes them difficult to notice until they gather indoors.
Habitat and feeding
They live outdoors on grasses, clover, weeds, and other low-growing plants, where they feed by sucking plant juices. Populations are often highest in lush, well-fertilized lawns and around homes with abundant vegetation.
Indoor nuisance
Clover mites sometimes enter homes and buildings in large numbers, especially during seasonal movement. They do not reproduce indoors for long and are mainly a nuisance because of their numbers and the red stain they leave when crushed.
Control and prevention
Common prevention methods include sealing cracks, removing grass and weeds near foundations, and creating a vegetation-free strip or gravel border around buildings. Indoor mites are often removed with a vacuum rather than by crushing them.
Key facts
- Clover mites are not insects; they are arachnids and true mites.
- They feed on plant juices, especially clover, grasses, weeds, and some ornamental plants.
- They do not bite humans or animals and are not known to transmit disease.
- They are considered a nuisance because they can invade homes in large numbers and leave red stains when crushed.
- They are most often noticed in spring and fall, especially around well-fertilized lawns and building foundations.
Clover mites are a common nuisance pest in Canadian homes and lawns, and Canadian pest-control guidance notes that they are not structurally damaging but can invade in large numbers and stain surfaces when crushed.[1]
Frequently asked questions
Are clover mites dangerous?
What do clover mites eat?
Why do clover mites appear indoors?
Do clover mites damage houses or furniture?
How can clover mites be kept out of a house?
References
- Orkin Canada — https://www.orkincanada.ca/pests/mites/clover-mites/Supports: Nuisance pest status, no biting, no disease transmission, red stains, building entry
- Wikipedia — https://en.wikipedia.org/wiki/Clover_miteSupports: Scientific name, broad distribution
- WebMD — https://www.webmd.com/a-to-z-guides/clover-mites-what-to-knowSupports: Size, colour, plant-feeding diet, non-biting behaviour
- Penn State Extension — https://extension.psu.edu/clover-mites/Supports: Plant-feeding, indoor invasion, no reproduction indoors
- Ohio State University Extension — https://ohioline.osu.edu/factsheet/HYG-2095Supports: Seasonal invasion, nuisance status, prevention methods
- Fox Valley Pest Control — https://foxvalleypestcontrol.com/clover-mites-facts/Supports: Arachnid classification, eight legs, cool-weather activity
- University of Connecticut — https://homegarden.cahnr.uconn.edu/factsheets/clover-mites/Supports: Description, front legs, feeding, red stains, lawn association
- Kansas State University Extension — https://bookstore.ksre.ksu.edu/pubs/clover-mites_MF915.pdfSupports: Nuisance pest description and building entry