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Brown Marmorated Stink Bug

Brown Marmorated Stink Bug

Brown Marmorated Stink Bug

(Halyomorpha halys)

Tags: Terrestrial

Identification and Reproduction



  • Shield-shaped, 13 – 17 mm long, brown marbled appearance, alternating brown and white markings on the outer edge of the abdomen; 
  • Can be distinguished from other stink bugs by the presence of distinctive white bands on the last two antennal segments.
  • Adults may be confused with other native brown stink bugs and western conifer seed bugs. 


  • Spherical, white or pale green, 1.6 x 1.3 mm; laid in clusters of 20 – 30 eggs on the underside of leaves.

Immature (nymph):

  • Nymphs range in size from 2.4 – 12 mm in length and do not have fully developed wings. 
  • Ist instar nymphs are bright orange to red in colour; 2nd instar nymphs are black, tick-like; later instars are pear-shaped, brown with white markings on abdomen and legs and white bands on last two antennal segments.


  • Development from egg to adult takes approximately 40 to 60 days, depending on temperature and photoperiod.

Habitat & Ecology

  • Ornamental hosts include tree of heaven, chokecherry, catalpa, boxelder, white ash, maple, English holly, and buckthorn.
  •  In British Columbia, they have been found on Asian pears, vegetables and wild chokecherries.


  • Brown marmorated stink bug are a major agricultural pest, and will attack tree fruits, berries, grapes, vegetables and ornamental plants - affecting crops and food being grown on farms


  • Homeowners: Low numbers of brown marmorated stink bugs can be removed by hand, sweeping or a shop vacuum. Prevent entry into the home by sealing off any access points. The use of insecticides for controlling brown marmorated stink bugs in the home is not recommended.


Brown Marmorated Stink Bug (BMSB) Pest Alert

Brown Marmorated Stink Bug Factsheet - identification and management (PDF)

Brown Marmorated Stink Bug - Brochure for Homeowners (PDF)

Controlling Brown Marmorated Stink Bug in Your Home (PDF)