Black Widow Spider
Pro Recommended
Identification
Shiny black spiders with a signature red hourglass marking on the underside of the abdomen. They build irregular, tangled webs in dark, sheltered spots like woodpiles, garages, and sheds. Their venomous bite can cause serious symptoms and warrants medical attention.
Can I DIY this?
Pro RecommendedHonest advice: most people should call a pro.
This pest is notoriously hard to eliminate with store-bought treatments alone, and failed attempts usually make the problem worse. DIY can knock down light activity, but for anything established we recommend a professional.
Find a trusted pest proRecommended products
Onslaught FastCap Spider & Scorpion InsecticideDirect & harborage spraySyngenta Demand CS Insecticide, 8ozExterior barrier spraySISUPASSIE 30FT Reach Cobweb Duster with Extension PoleRemove webs & egg sacsSome links may be affiliate links. Buggsy may earn a commission at no extra cost to you. Always follow the product label.
- Identify the species — note if it's a medically significant one (like a black widow or brown recluse) and treat those with extra caution.
- Knock down and remove webs on sight, indoors and out; spiders won't stay where they can't rebuild.
- Reduce the insects they're feeding on — fewer prey means fewer spiders sticking around.
- Apply a residual concentrated insecticide along baseboards, window and door frames, under furniture, and in closets or storage areas.
- Treat the exterior foundation (about a foot up the wall and a foot out onto the ground) plus any utility entry points.
- Place sticky traps in corners, closets, and under appliances to monitor activity over time.
Wear long pants, a long-sleeved shirt, closed-toe shoes with socks, chemical-resistant gloves, and goggles. Add a respirator if the label calls for it or ventilation is poor.