Last September we published our first post about the potential for the spotted lanternfly, Lycorma delicatula, to be a pest of serious concern to Oregon agriculture. At the time, only a handful of eastern states had reported established populations (Pennsylvania has been the most impacted). More recently, a live adult spotted lanternfly was reported in Davis, California.

The jump from eastern seaboard states to the west coast is significant, and we want to remind everyone to be aware and prepared to report any sightings. The spotted lanternfly has a large potential range (see map below), including the Willamette Valley and other important agricultural areas of Oregon and Washington.

The discovery of a live adult spotted lanternfly has added prompted UC Cooperative Extension Entomologist Surendra Dara to provide early detection guidelines and an overview of its biology, current US distribution and management options.

Scientists have released a map showing that the spotted lanternfly has a large potential range in the United States. Read more from the USDA.

Early Detection

Researchers in California are encouraging growers to be aware of this new potential pest of grapevines. Vineyards are among the most likely to be impacted by a spotted lanternfly infestation, but fruit trees and landscape plants will also be at risk. Early detection and reporting is our best defense to prevent new infestations of spotted lanternflies.

Spotted lanternflies are distinctive in both their nymph and adults stages. Here is a gallery that highlights each stage.

What should you do?

Report a suspected spotted lanternfly sighting to the OSU Plant Clinic. The OSU Insect ID Clinic also provides free insect identification.

OSU Plant Clinic
Department of Botany & Plant Pathology

Download Spotted Lanterfly Alert Poster (Web Version)
Download Spotted Lanterfly Alert Poster (Large Print File)
Spotted Lanternfly