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Orb Weaver

FAST FACTS - GARDEN SPIDERS
by Nanette Londeree, Master Rosarian

SIGNS

  • Eight-legged creatures with two body parts, no wings, no antennae
  • Silken egg sacs

    SYMPTOMS

  • Shoots and silken webs on leaves
  • Small burrows in soil that are lined with spider silk

    Wolf Spider CAUSE

    Wide range of spiders of the Class Arachnida and Order Araneae:

  • Orb weaver and garden spiders (family Araneidae)
  • Wolf spiders (family Lycosida)
  • Jumping spiders (family Salticidae)
  • Crab spiders (family Thomisidae)

    OPTIMAL CONDITIONS

  • Soil with mulch that provides protection and humidity
  • Places for web attachment
  • Dense shrubs and coniferous trees
  • A water source
  • Flowers and plants that attract prey

    TREATMENT

    Prevention:

  • Maintain good garden sanitation - clean up woodpiles, old boards and other debris where spiders often live
  • Locate where the spiders live and what prey is supporting their population, and eliminate the prey
  • Use a hose with high-pressure water on the outside of the house to knock down and destroy webs, egg sacs and spiders
  • Use yellow or sodium vapor light bulbs at outside entrances to reduce night-flying insects (prey) which attract spiders

    Elimination:

  • It’s not recommended to use pesticides for spider control
  • If necessary, use insecticides that include pyrethrins, resmethrin, allethrin, or combinations of these products

    GOOD GUY / BAD GUY?

  • They are really good guys – they’re voracious predators that eat almost anything
  • They can rapidly colonize a suitable habitat and eat enormous numbers of insects
  • Many overwinter as adults and can reduce prey numbers early in the season

    Photo of Orb Spider by Alan Goulet, and photo of Wolf Spider by Lawrence Sawyer - both used with permission from:
    http://www.istockphoto.com/


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    Last Modified: 08/06/2013