About the pest

  • as an adult, Halyomorpha halys is a 12-17 mm long mottled brown coloured stink bug, shaped like a shield
  • very wide host range and affects many plants, including tree nuts such as hazelnut, pecan and potentially walnuts
  • originally from eastern Asia, but recently introduced to North America and Europe where it is having a significant impact on agriculture and as a nuisance pest
  • saliva causes significant damage to plant tissues
  • eggs are cream to yellow-orange and approximately 1.6 mm long and laid in clusters on the underside of leaves
  • five nymph stages that range from less than 3 mm to 12 mm long. The nymphs are orange and black when they first hatch but quickly develop a similar colouration to the adults
  • the adults and larvae can be confused with a number of other brown coloured stinkbugs that are present in Australia
  • hitchhikes in container shipments of a range of commodities, including plant material. Adults are capable of flight allowing localised spread of the pest

More information

Brown marmorated stink bug (Department of Agriculture)

Brown marmorated stink bug fact sheet (Plant health Australia)