Brown Marmorated Stink Bug

Halyomorpha halys


Adult brown marmorated stink bug (David R. Lance, USDA APHIS PPQ,


Stink bug leaf damage (Gary Bernon, USDA APHIS PPQ,

Leaf damage

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


  • shield-shaped insect; generally brown/gray in color
  • alternating white and black bands on antennae
  • smooth shoulders (no spines)
  • black and white alternating pattern surrounding wing

Nesting Habits

  • can overwinter in mass in buildings and houses
  • lay eggs on host plants


  • broad host range including fruits, vegetables, field crops, ornamentals, weeds and native species


  • nuisance: congregate indoors over winter; can annoy building occupants
  • overwinter in cracks and crevices in buildings
  • emit an unpleasant odor when smashed
  • not a health threat
  • can cause damage to host plants

IPM Recommendations

  • Seal cracks and crevices that may allow stink bugs to enter buildings.
  • Vacuum to remove indoor and outdoor populations.
  • Avoid planting host plants around buildings if possible.

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