From: Gary W. Hickman, Horticulture Advisor
University of California Cooperative Extension
August 22, 2001
DADDY-LONG-LEGS
BACKYARD HORTICULTURE
By Gary W. Hickman, Horticulture Advisor
University of California Cooperative Extension, Mariposa County
Several Mariposans have called us asking for advice on discouraging Daddy-Long-Legs. Found under house eaves, decks and in garage areas, these creatures have eight very long, thin, legs. If in danger of being caught, they can break off a portion of a leg and then escape while the detached leg continues to quiver in front of a surprised predator. Although they look like spiders, they are not. True spiders have two distinct body segments and insects have three such segments, so the one-part body of daddy-long-legs puts them into a distinct group. They are more properly called harvestmen and are harmless to humans and pets. They usually feed on dead insects, which helps explain why they are found under eaves, in woodpiles and similar areas. In the fall season, female harvestmen (or should it be harvestwomen?) lay eggs into crevices in wood or in the soil. Most adults probably do not live through the winter.
Mechanical control would be the best option, if necessary, for these animals. That would include water sprays, air blasts or even just a broom. Some pyrethroid spray products have general labels for outdoor spider, insect and other pest control. These chemicals give quick knockdown and some have residual control. If you decide to use any of these chemicals, always read and follow all label directions. Also make sure your intended use is specified on the label.
If you have questions about true spiders, the University of California Cooperative Extension office at the Mariposa County Fairgrounds has a free leaflet available. Call 966-2417 or write to 5009 Fairgrounds Rd. for a copy.
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