PK-AR02 · Spiders, scorpions, and mites
How to get rid of Brown recluses
Loxosceles reclusa
Brown recluses are violin-marked, six-eyed (in three pairs) spiders of the south-central United States. The internet has diagnosed every necrotic sore in Maine as a recluse; range maps from entomologists say otherwise. Wolf spiders, cellar spiders, and southern house spiders get blamed constantly. True Loxosceles bites can necrotize — that is a clinician’s problem, not a Facebook group’s. Control in endemic areas is reduction of cardboard clutter, sticky monitors along walls, shaking out clothes stored on the floor, and sealing. Do not fog a house because you saw a spindly spider in Oregon and read a meme.
How to identify Brown recluse
- Violin on the cephalothorax, uniform tan legs without dark bands, six eyes in pairs — confirmation often needs a microscope or expert.
- Hides in cardboard, closets, and undisturbed rooms. Not an orb weaver.
- Range-limited: south-central US. Outside that, assume another spider until an expert says otherwise.
Signs of an infestation
- Spiders in stored boxes in endemic states.
- Bites claimed after putting on clothes left on the floor — still get medical ID, not a meme.
Biology and why they show up
Reclusive, dry indoor harborage. They hunt more than they spin large webs. Populations in some Kansas and Missouri homes can be large without people noticing.
Health and property risk
Cytotoxic venom, possible necrotic lesions, rare systemic effects. Misdiagnosis of MRSA and other sores as “recluse bites” is a documented medical problem — see a clinician.
Proven control sequence
Work in this order. Skipping inspection or exclusion is why most “treatments” bounce back in a week.
- Respect the range map. If you are in Seattle or Boston, you almost certainly do not have an established recluse population. ID the spider you have.
- In endemic housing: clutter down, clothes off the floor, monitors. Glue traps along baseboards (pets/kids away). Shake clothes and towels.
- Bite: medical care, not necrosis folklore. Do not cut, burn, or apply unapproved chemicals to a wound. Photograph the lesion and the spider if available.
Matching tools for these steps can be bought on Amazon. Buy the field kit.
Tools around brown recluses
Monitors and clutter reduction in the native range. Identification first — wolf spiders are not recluses.
As an Amazon Associate, Pest Kill earns from qualifying purchases. The EPA label is the law for any pesticide. These links match the sequence on this page — they are not a shopping list instead of identification. Details: advertising disclosure. Browse the full tools catalog.
Hardware
Sticky cockroach / insect monitors
Monitors tell you if the next cabinet or the next apartment is feeding yours. They are not control by themselves. Place them on the floor at harborages, not in the middle of a clean counter.
Hardware
Headlamp or flashlight for inspections
German cockroaches, rodent runways, and bed-bug harborages are night-shift jobs. A light you can point into a hinge beats another can of spray.
Prevention that actually sticks
- Reduce cardboard in closets in endemic states.
- Bed away from walls, like bed bugs — different pest, similar isolation logic.
When to hire a licensed professional
Heavy endemic infestations. Bite: physician. Identification: university extension or a diagnostic lab, not a pest-control guess from a blurry photo if the answer changes treatment.
United States and Tier 1 notes
Core: AR, MO, KS, OK, TX north, neighboring states. Pacific and Northeast claims are usually wrong. Mediterranean Loxosceles rufescens exists in some buildings — still an expert ID.
Common questions
I live in California and a doctor said recluse. Is that common?
Established L. reclusa populations are not a California story. Ask for a specialist ID. Other Loxosceles occur rarely; most “recluse” diagnoses on the coasts are other conditions or spiders.