Control: Periodically check areas in and around the home where black widows may occur. When discovered they can be most effectively destroyed by crushing or vacuuming the web and spiders. Spiders also can be discouraged by increased lighting of darkened corners, such as by appropriate furniture arrangement or use of artificial lighting. Insecticides can be useful for spider control but do not control all spiders. If you choose to apply an insecticide, do so to the dark, undisturbed areas where spiders are likely to produce webs. From http://generalx.com/bwtxt.html''