There are over 35,000 described species of spiders worldwide, with about 3,000 occurring in North America. Many species of spiders are classified as household pests. In the United States, only two spider groups are considered dangerous to man, the widow spiders and the recluse spiders.
Black Widow Spider – the adult female are black with a reddish hourglass shaped marking on underside. Adult male usually have a color pattern on dorsal or upper surface, pattern variable but typically consists of a median row of red spots with white lines or bars radiating out to sides.
Brown Widow Spider – brown or grayish-brown color, abdomen with 3 white spots on top, with a median white band on rear, with 4 diagonal white bands on either side, and with a yellow to orange hourglass mark on underside. Recently established in southern California from San Diego to Los Angeles.
Brown Recluse Spider – color tan to dark brown, usually with a darker “violin” shaped marking on top.
Spider Control is a 6-Step Process
(5) Mechanical Measures
(6) Pesticide Application
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