Stink Bugs

    Stink Bugs

    Acrosternum; Brochymena; Chlorochroa; Eustichus

    green stink bug

    Green stink bug (Vik Nanda, Wikimedia Commons)

    consperse stink bug

    Consperse stink bug (Steven Valley, Oregon Department of Agriculture, Bugwood.org)

    stink bugs

    Stink bug nymphs (Herb Pilcher, USDA Agricultural Research Service, Bugwood.org)

    Pest Description

    • adults: ~ 1/2 – 5/8 inch long; brown to green; shield-shaped
    • nymphs: smaller with variable markings and coloration
    • straw-like mouthparts used for sucking
    • eggs: typically round to barrel-shaped and laid in clusters on leaves

    Host Plants, Diet & Damage

    • broad host range: ornamentals, fruits, vegetables, crops, weeds, etc.
    • rough stink bugs are beneficial predators; occasionally minor feeding on leaves
    • damage to ornamentals is usually negligible
    • stipple leaves causing yellow spotting
    • bud abortion, cat-facing/pitting on fruits and deformation of vegetables
    • can emit an unpleasant odor

    Biology, Life Cycle & Damaging Life Stage

    • overwinter as adults in hidden places outdoors (under bark, leaf debris, wood piles, etc.)
    • adults become active with warming temperatures in the spring
    • one to many 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.