Pyramid Ants

    Pyramid Ants

    Dorymyrmex spp.

    pyramid ant

    Pyramid ant (Gary Alpert, Harvard University, Bugwood.org)

    pyramid ants

    Pyramid ants (Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org)

    pyramid ant nest

    Pyramid ant mound (John Pearson, Bugguide.net)

    Pest Description

    • small; 1/8 inch long; color ranging from yellow, brown to black
    • single node (bump between middle and rear body sections)
    • worker ants of one size
    • have a pyramid-shaped projection on top of the thorax

    Host Plants, Diet & Damage

    • feed on sweets and live and dead insects
    • honeydew produced by aphids and other insects
    • crater-like mounds can become dense and unsightly in turf and outdoor areas
    • occasionally invade buildings in search of food or moisture
    • can bite

    Biology, Life Cycle & Damaging Life Stage

    • one queen per colony
    • prefer open, dry, sunny areas; soil nesting
    • distinctive “crater” nests consisting of a hole surrounded by a mound of excavated soil
    • nests are typically small and shallow
    • common in the drier, sandier parts of the state
    • adult workers are the damaging life stage

    IPM Recommendations

    • If the nest can be located, directly drench the shallow nest with an appropriately labeled insecticide.
    • Use sweet ant baits.