In 2020 the Oregon Department of Agriculture detected one Asian gypsy moth on Sauvie Island and one European spongy moth near Rainier. ODA plans to mass trap these areas to determine if we have an established population. During May 2019, ODA, in conjunction with the USDA and other federal and state agencies, treated a 45-acre area of Corvallis (Benton County). A ground application of the biological pesticide Bacillus thuringiensis kurstaki appears to have eradicated the European spongy moth population. Spongy moths have not been detected in traps in Benton County since 2018 but we will continue our delimination trapping efforts through 2021.
Oregon Health Authority: Btk Insecticide FAQs
Spongy moth awareness video
From the Washington Dept of Agriculture, this video includes 13 ways spongy moths damage the ecosystem, the economy, and harm people. Also included, how to identify spongy moth and eradication methods. YouTube Video