Washington had fewer dead or dying trees last year, but beetles that feed on dry trees caused greater damage across the state, a concerning trend for environmental officials.

Nov. 9—YAKIMA — The Washington State Department of Agriculture Pest Program saw its first substantial decline in Japanese beetle numbers after trapping more than 19,000 beetles this summer in ...

Once established, Japanese beetles are tough to eradicate, but it may be possible to keep them under control, said David Crowder, a Washington State University entomologist. "These coordinated ...

PULLMAN, Wash. — Within two decades, the invasive Japanese beetle could invade its way throughout the state of Washington without intervention, according to a recent study. The Japanese beetles ...

The beetles threaten both crops and Washington’s native plants, some of which, including huckleberries, are endangered or culturally important to tribes in the state, said Haubrich.

Apr. 2—OLYMPIA — Annual treatments against invasive Japanese beetles began Monday in South Central Washington, according to an announcement from the Washington State Department of Agriculture.

Property owners in part of Pasco will be asked for the first time to allow the Washington state Department of Agriculture to spray their property for the larvae of destructive Japanese beetles.

Carabus blaptoides. Through whole genome sequencing and genetic analysis, the team identified the gene odd-paired (opa) as the key factor determining the beetle's head shape. High expression of ...