Brown Marmorated Stink Bug

Brown Marmorated Stink Bugs (BMSB; Halyomorpha halys) are an exotic pest and is a threat to Australian agriculture and the environment. BMSB is known to feed on more than 300 hosts, including vegetable crops and fruit and ornamental trees.

They’re roughly the size of a 5 cent coin, and their mottled-brown bodies looks like a shield. They let off a distinctive, unpleasant odour when disturbed or crushed. BMSB look similar to native Australian stink bugs. The white bands on their antennae are a distinguishing feature.

BMSB is a high priority pest known to stow away in cargo arriving from the northern hemisphere between September and April each year. Importers must monitor incoming containers for BMSB. The Australian Government has also increased inspections and treatment of the pests at the border.

These bugs can be found in homes during autumn and winter as they seek shelter from the cold. They lay their eggs on the back of leaves, and juveniles and adults eat the plants.

If you think you have seen Brown Marmorated Stink Bugs in your crops or backyard call the Exotic Plant Pest Hotline on 1800 084 881 or contact ACT Biosecurity by emailing ACTBiosecurity@act.gov.au or calling 02 6207 3587.