Home PageShop By PestGeneral Household PestsBlack Widows

Black Widows


Size: Body may be up to 3/4-inch in length with the abdomen reaching 3/8-inch in diameter. Color: Typically glossy black but may also be dark brown to light brown. Related widow spiders may be brown.

Black widow spiders construct irregular, scaffold-type webs usually near the ground level. These webs are almost always constructed in a protected site such as among items piled together, beneath boards, in firewood, and between boxes. Newly hatched spiderlings climb to highpoints, release a strand of webbing and are propelled by “ballooning” to new locations. For this reason, buildings may have new spiderlings float to it on a regular basis.

Mechanical control measures can be very effective for immediate and long term control. What we mean by “mechanical control” is simply locating spiders and webs and physically destroying them. Use the Cob Web Duster for brushing out spiders and their webs. By regularly removing old webbing, you can easily determine new activity, and it also removes their food sources in the webs making their environment uninhabitable.

Treat with a residual insecticide such as Talstar, Tempo, or Fendona CS around the foundation of the structure, window frames, door frames, soffit areas, vent openings, exhaust areas, garages, basements, mounted lights, air conditioning areas, cable entry points, deck areas, stoop and patio areas.

Using Drione or Delta Dust in the attic area would be a good measure if there is an infestation in that area. Or you can apply Delta Dust to your crawl space, as it is moisture proof.

Youtube demonstration video on how to use Talstar Pro Perimeter Spray to achieve effective control while minimizing risks to non-target organisms.

Insecticide Concentrates for Spiders

– These concentrates are mixed with water and used in a compressed hand held sprayer to make your application.

Aerosols & Ready to Use Products for Spiders

These “ready to use” products are convenient and great for a contact kill and great for flushing out insects. Most offer great residual properties as well.

Dusts for Spiders

Dusts are usually used to treat into cracks and crevices (such as in the crack between the wall baseboard and floor), in wall voids, cavities, attics or crawl spaces. Be sure that there is proper ventilation in the room and that you don’t over dust or dust in areas accessible by people.

Insecticide Granules

These “ready to use” granular crystals are convenient and great for a contact kill and have a great residual properties for the exterior. They fall down into and under landscape material such as turf, rock or mulch to target problem pests.