Brown Marmorated Stink Bug

    Brown Marmorated Stink Bug

    Halyomorpha halys

    brown marmorated stink bug

    Adult brown marmorated stink bug; note bands on antennae and pattern surrounding wings (David R. Lance, USDA APHIS PPQ, Bugwood.org)

    stink bug leaf damage

    Stink bug leaf damage (Gary Bernon, USDA APHIS PPQ, Bugwood.org)

    stink bugs

    Stink bug eggs and nymphs (David R. Lance, USDA APHIS PPQ, Bugwood.org)

    Pest Description

    • adults: ~ 5/8 inch long; brown/gray in color; shield-shaped
    • alternating white and black bands on antennae; smooth shoulders (no spines)
    • black and white alternating pattern surrounding wings
    • nymphs: smaller with orange and black markings
    • eggs: white, round and laid in clusters of 20-30 on leaf undersides

    Host Plants, Diet & Damage

    • broad host range: ornamentals, fruits, vegetables, crops, weeds, etc.
    • stipple leaves causing yellow spotting
    • cat-facing on fruits and deformation of vegetables
    • major nuisance pests in structures
    • emit an unpleasant odor when smashed

    Biology, Life Cycle & Damaging Life Stage

    • overwinter as adults in structures or in hidden places outdoors
    • adults become active April through May and feed prior to egg laying
    • eggs are laid continuously throughout the growing season
    • two generations per year
    • immatures and adults are the damaging stages

    IPM Recommendations

    • Manage trees to improve or maintain health.
    • Monitor ornamentals and other plants starting in April.
    • Stink bug damage to ornamentals can be tolerated.
    • Apply an insecticide (pyrethroid) to ornamentals when adults or nymphs are present.
    • If sighted, report this pest here.

    For more information, see our Brown Marmorated Stink Bug fact sheet.