How To Get Rid Of Clover Mites, According To An Entomologist

Clover mites feed on more than 200 different species of plants, preferably clover, which gives them their name. But, surprisingly, they typically aren’t a huge problem for homeowners outdoors. It’s when they head indoors—in large numbers—that it’s a little more upsetting. “Clover mites are an occasional invader into our homes,” says Eric Benson, PhD, professor emeritus and extension entomologist with Clemson University. “In some years, you’ll see more than others. When the temperature and moisture levels are right, the population can explode.”

What Are Clover Mites?

These tiny red or green-brown mites (Bryobia praetiosa) are smaller than a pinhead, but thousands of them may come into your home under the threshold or through small cracks during the spring or fall. They become dormant in summer. Fortunately, clover mites don’t bite and aren’t harmful to people and pets, and they don’t damage structures, such as termites. They also don’t fly because they have no wings, says Benson.

These minute pests, which are related to spiders and ticks, are more bothersome than anything else. Indoors, they’ll desiccate quickly due to lack of moisture, says Benson. Probably the most annoying issue is that squishing these little mites will cause a reddish stain—which is why people sometimes worry they’re blood-sucking parasites. But the truth is that the red stain is due to pigments from their body fluids.

How To Get Rid Of Clover Mites Indoors

If you have a clover mite invasion in your home, simply use a vacuum to suck them up without crushing them to prevent stains, says Benson. Toss the sweeper bag, and put it in an outdoor trash can. You also can use a damp rag to try to dab them up without smashing them. Indoor pesticides are not recommended because the mites will dry out in a day or two inside your home anyhow.

How To Prevent Clover Mites From Coming Indoors

Try these tips for discouraging clover mites from entering your home, suggests Benson:

• Seal obvious gaps under doors or around windows. But because they’re miniscule, it’s nearly impossible to prevent all access.
• Remove grasses and weeds from right up against your home’s foundation. Leaving a bare or gravel strip about 18 to 24 inches wide next to your home may deter them.
• Cut back branches that touch your house to prevent easy access.
• Use a miticide around the foundation of your home if they become a routine problem. Treating the foundation may prevent them from entering the building. Make sure the insecticide is labeled for outdoor use, and follow the instructions.
• Plant flowers that are not attractive to clover mites near the foundation. That includes geranium, chrysanthemum, marigold, and salvia or shrubs such as barberry, juniper, spruce, and yew.
• Make sure to apply the correct amount of nitrogen to lawns. Some anecdotal evidence suggests that too much nitrogen worsens clover mite problem