Scientific name: Halyomorpha halys

What Is It?

A brown marmorated stink bug is native to East Asia and was first noticed in the United States in the late 1990s, possibly having arrived in a shipping crate. It will attack a large variety of plants-more than 170 species-including many fruits and vegetables. It leaves small necrotic patches on any plant matte it eats, rendering produce inedible. Homeowners likely will notice an invasion before anyone else, because the brown marmorated stink bug initially will attack vegetable gardens and landscaping plants, and will spend the winter in homes and other human-made structures.

Is It Here Yet?

Yes. As of 2016 they have been found in 19 countries in Washington.

Why Should I Care?

With its varied appetite, brown marmorated stink bugs pose a big threat to both gardens and agriculture. The damage they do to crops and the efforts to control them are costly.

How Can We Stop Them?

Pesticides may control them, but also may hurt beneficial species such as ladybugs. Pheromone and light traps are other control options for outdoor and indoor use.

What Are Its Characteristics?

  • Mottled brown and shield-shaped, 1/3 to 2/3 inches long.
  • Antennae, abdomen, and legs have alternating dark and light bands.
  • The edge of the shoulder is smooth when looking down at the insect

How Do I Distinguish It Form Native Species?

There are a few native species that look similar to brown marmorated stink bugs. Use this guide to distinguish natives.

Additional Photographs