Northern Giant Hornet

Scientific Name: Vespa mandarinia The Entomological Society of America has changed the accepted common name of Vespa mandarinia. “Northern giant hornet” has been formally adopted as the new common name. To learn more visit the Entomological Society of America Web site. What Is It? Northern giant hornet is an invasive species from Asia and a known predator of […]

April 10, 2020
Sirex Woodwasp

Scientific Name: Sirex noctilio What Is It? The Sirex woodwasp is a species of wasp native to Eurasia and northern Africa. It primarily attacks pine trees (sometimes also spruce and fir trees), laying its eggs along with a symbiotic fungus and toxic mucus that kill the tree. The larvae tunnel through the wood, eventually emerging […]

September 18, 2019
European Chafer

Scientific name: Amphimallon majale What Is It? The European chafer is a beetle that feeds on grass roots while in its larval (grub) phase, killing the grass and leaving visible dead patches. grubs feed on grass in fall and spring. Most of the damage is caused in spring just before pupation, the transition from grub […]

September 18, 2019
Spotted Winged Drosophila

Scientific name: Drosophila suzukii What Is It? Spotted wing drosophila is a small vinegar fly from East Asia that lays its eggs in softer, thin-skinned fruits, such as berries. A spotted wing drosophila are able to lay its eggs in healthy fruit that is still ripening, as opposed to other vinegar flies that only attack […]

September 18, 2019
Citrus, Asian, and Red-Necked Longhorned Beetles

Scientific names: Citrus Longhorned Beetle (Anoplophora chinensis), Asian Longhorned Beetle (Anoplophora glabripennis ), and Red-necked Longhorned Beetle (Aromia bungii) What Are They? Citrus (Anoplophora chinenses), Asian (Anoplophora glabripennis), and red-necked (Aromia bungii) long-horned beetles are large beetles whose larvae feed on and in the wood of trees. When the beetles mature to adulthood, they emerge […]

August 26, 2019
Onion Leaf Miner

Scientific name: Phytomyza gymnostoma What Is It? The onion leaf miner (or allium leaf miner) is a fly native to parts of Europe that attacks plants in the Allium genus, which includes onions, garlic, leeks, chives, and more. The larvae chew the leaf tissue in a long trail down the plant, eventually forming a pupa […]

August 21, 2019
Brown Marmorated Stink Bug

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 […]

August 13, 2019
Japanese Beetle

Scientific name: Popillia japonica What Is It? The Japanese beetle is a garden pest native to northern Japan. The adults eat the leaves of plants while the larvae attack the roots, particularly the roots of grasses. Is It Here Yet? Yes. In 2020, the Washington Department of Agriculture found two Japanese beetles near Grandview, WA […]

August 13, 2019
Apple Maggot

Scientific name: Rhagoletis pomonella What Is It? The apple maggot is an insect native to eastern North America. It is considered one of the worst apple pests in the world, and is a major threat to Washington apple production. Adult maggots lay eggs inside the fruit. The eggs then hatch into young worms and consume […]

August 8, 2019
Emerald Ash Borer

Scientific name: Agrilus planipennis What Is It? The emerald ash borer is a small Asian, wood-boring beetle that may attack and kill ash trees. The larvae burrow under the tree’s bark and eat the sapwood. These damaged layers of tissue below the bark are critical to transporting water and nutrients throughout the tree. Once damaged, […]

August 8, 2019
Scarlet Lily Beetle

Scientific name: Lilioceris lilii What Is It? The scarlet lily beetle (also known as the lily leaf beetle) is a pest native to Eurasia that preys on true lilies and fritillaries. While all lilies are attacked, Asiatic lilies or hybrids and some native North America lilies tend to receive the most damage. Other plants that […]

August 2, 2019
Spongy Moth

Scientific name: Lymantria dispar The Entomological Society of America has changed the accepted common name of Lymantria dispar. “Spongy moth” has been formally adopted as the new common name. To learn more visit the Entomological Society of America Web site. What Is It? Spongy moths include Lymantria dispar asiatica, Lymantria dispar dispar, and other invasive moths […]

July 31, 2019
Spotted Lanternfly

Scientific name: Lycorma delicatula What Is It? The spotted lanternfly is a piercing, sucking insect native to Asia. Adults and nymphs pierce plants and feed on sap from stems. The insects are strikingly colored and fairly easy to identify. Is It Here Yet? No, but spotted lanternfly is in the eastern United States. It was […]

July 29, 2019