Baldfaced Hornet - School IPM - USU Extension

    Baldfaced Hornet

    Dolichovespula maculata

    Baldfaced hornet

    Baldfaced hornet (Piccolo Namek, Wikimedia Commons)

    Baldfaced hornet

    Baldfaced hornet (Johnny N. Dell, Bugwood.org)

    Baldfaced hornet

    Baldfaced hornet nest (The High Fin Sperm Whale, Wikimedia Commons)

    Identification

    • 5/8 - 3/4+ inch long
    • black with yellowish-white face; no hairs

    Nesting Habits

    • social
    • colony dies off every fall; fertilized queens overwinter
    • nest on building eaves, etc., or in plants/trees: aerial
    • queens start new every spring; colonies grow throughout the summer months

    Diet

    • insects
    • nectar

    Significance

    • nests pose a serious health risk to humans

    IPM Recommendations

    • Monitor for nests from early summer - fall.
    • Purchase and use a bee veil, suit and gloves.
    • Minimize nesting habitat around property.
    • Install tight-fitting screens in windows.
    • Nest removal: wear protective bee veil, suit and gloves; at night using a ladder or bee pole, apply an aerosol wasp insecticide into the nest entrance hole, bag and remove the nest and place the bagged nest in a dumpster away from children and people.

    Additional Resources

    IPM for Stinging Bees and Wasps: Integrated Pest Management in Sensitive Environments (University of Nebraska-Lincoln Extension)