Isopods - School IPM - USU Extension



    Pill bug

    Adult pill bug (Joseph Berger,

    Pill bug

    Adult pill bugs (Gary Alpert, Harvard University,

    Pill bugs

    Pill bugs of various sizes (Wikimedia Commons)


    • also known as sowbugs or pillbugs
    • range from 1/4 to 5/8 inch long
    • dark to slate gray
    • oval, segmented, armored bodies
    • can roll up into a tight ball when disturbed

    Nesting Habits

    • many habitats including moist soil, leaves, grass, wood piles, mulch and stones
    • require high moisture
    • come indoors when moist conditions exist


    • decaying organic material


    • occasionally come indoors under thresholds/doors
    • may be a nuisance indoors

    IPM Recommendations

    • Minimize moisture and hiding/feeding areas near the foundation.
    • Seal cracks around the outside foundation wall.
    • Install tight-fitting door sweeps at the base of all exterior doors.
    • Vacuum individuals that enter buildings.