Orb Weaver Spiders - School IPM - USU Extension

    Orb Weaving Spiders

    Araneidae; Tetragnathidae

    Orb Weaver Spider

    Left: Banded garden spider (Ward Upham, Kansas State University, Bugwood.org) Right: Catface spider (Joseph Berger, Bugwood.org)

    Orb weaver

    Left: Shamrock orb weaver (David Cappaert, Michigan State University, Bugwood.org) Right: Typical orb web (Tom Bean, Encyclopedia Britannica Online)

    Orb weaver

    Long-jawed orb weaver (David Cappaert, Michigan State University, Bugwood.org)

    Identification

    • small to large spiders
    • generally with a large, bulbus abdomen
    • make classic orb-shaped web

    Nesting Habits

    • often found around buildings and homes in late summer and early fall, especially around overhanging structures (e.g., porches or entryways) or in ornamental plantings
    • spiders die out every year and leave egg sac behind
    • eggs hatch in spring and spiderlings disperse
    • common near exterior lighting

    Diet

    • insects and spiders

    Significance

    • could be a nuisance pest outdoors, especially the webs
    • not known to be a health hazard
    • beneficial

    IPM Recommendations

    • Minimize nesting habitat around property.
    • Seal exterior cracks and crevices to reduce daytime hiding places.
    • Install tight-fitting door sweeps at the base of all exterior doors.
    • Install tight-fitting screens in windows.
    • Keep windows closed.
    • Vacuum individuals and webs inside and outside of buildings on a daily basis.
    • Step on or smash individual spiders that enter.
    • Catch and release (with a glass jar) spiders found indoors.
    • Change exterior lighting to sodium vapor bulbs.

    Additional Resources:

    IPM for Spiders: Integrated Pest Management in Sensitive Environments (University of Nebraska-Lincoln Extension)