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)
- 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
- 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.