Pavement Ant

    Pavement Ant

    Tetramorium caespitum

    pavement ant

    Pavement ant (April Nobile, Antweb.org)

    winged pavement ant

    Winged pavement ant (Whitney Cranshaw, Colorado State University, Bugwood.org)

    pavement ants

    Pavement ant swarm (Joseph Berger, Bugwood.org)

    Pest Description

    • 1/10 - 1/8 inch long; light to dark brown with fine grooves lining the head and thorax (middle body section)
    • two nodes (bumps between middle and rear body sections)
    • legs and antennae lighter than the rest of the body
    • worker ants of one size

    Host Plants, Diet & Damage

    • prefer greasy and protein materials such as meats, pet food, sweets, bread, nuts and insects
    • nests often located outdoors under stones, pavement cracks, wood, next to buildings and under building foundations
    • swarms and mounds can be unsightly and alarming
    • can infest gardens and other outdoor areas
    • nuisance pest indoors and outdoors

    Biology, Life Cycle & Damaging Life Stage

    • one queen per colony
    • characteristically produce small mounds at nest entrances
    • typically swarm in spring after rain; can swarm indoors
    • adult workers are the damaging stage

    IPM Recommendations

    • If the nest can be located, directly drench the shallow nest with an appropriately labeled insecticide.
    • Use liquid insecticidal bait stations.