Natural Ways to Kill Spiders in the Home

Diatomaceous Earth

• This powder, available in agricultural feed stores, causes spiders to dehydrate. The powder is a soft, natural silicon-based rock that absorbs lipids from the outer skin of pests, making them deficient in water pressure.

Sealing

• Spiders hide in dark and damp places around the house. Filling all cracks with sealants and caulk will suffocate the spiders hiding within the cracks.

Cleaning

• Vacuuming the spider infested areas in the home helps to kill spiders effectively. Vacuum places like windowsills, the backs of doors and dark places in garages. Toss the vacuum bag in the trash to ensure that the spiders will die in the garbage bin, or they may eat each other to survive for awhile.

Glue Boards

• Placing glue boards in places where crawling spiders dwell, like windowsills, behind furniture and near doors, effectively kills spiders without the need for pesticides. Glue boards probably will not, however, successfully kill many species of web-building spiders.

Green Insecticides

• Green insecticides, or commercially available nonchemical insecticides, effectively kill spiders in a nontoxic manner. Some insecticides have a mixture of detergent, oil and mint oil that kill spiders without harming humans. The detergent poisons the spider through its outer skin and poses no harm to others in the household.

Predators

• Adopting cats from a local shelter or raising pet cats helps to kill spiders naturally. Cats not only kill mice but also spiders. Introducing ladybird bugs that eat spiders will also help to eliminate spider infestation.