State plans to spray for gypsy moths in Woodway and Everett

The Washington State Department of Agriculture is preparing to spray insecticide in Woodway and Everett to combat an outbreak of gypsy moths, including the newly identified Hokkaido variety. First trapped in Woodway in July, this invasive species is a significant threat due to its increased mobility and potential for widespread damage. Unlike European gypsy moths, the Hokkaido variety feeds on a broader range of trees and shrubs common in the region, raising concerns among local environmentalists and agriculture officials. The department plans to release Bacillus thuringiensis var. kurstaki, a biological insecticide, to manage the population.

Before proceeding, thorough environmental reviews will be conducted in consultation with agencies such as the U. S. Department of Agriculture. The history of gypsy moths in the U. S.

dates back to 1869, when they were introduced for silk production, leading to the defoliation of millions of acres of forest. Washington has implemented spraying operations since 1979, but a stable population has yet to be established in the state. The urgency of this situation highlights the need for proactive measures to mitigate the ecological impact of these invasive pests.