Washington begins annual invasive pest survey

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Washington state’s annual search for over 130 invasive insects, weeds and plant pathogens has begun.

Employees with the state Department of Agriculture are traveling across Washington to set traps for species such as spongy moths, Japanese beetles and apple maggots.

Of the agency’s top priorities is the eradication of Japanese beetles in south central Washington. The small green and brown beetles skeletonize leaves and damage flowers and fruit. The species established itself in the eastern U.S. and has become a pest for both residents and the agricultural industry.

In 2021, the agency found nearly 24,000 beetles in Grandview and surrounding areas. After a decline in numbers in 2023, the Japanese beetle population jumped up to over 70,000 in 2025. The beetles were found in Sunnyside, Mabton, Wapato, Pasco, Kennewick and near SeaTac.

https://washingtonstatestandard.com/briefs/washington-begins-annual-survey-for-invasive-pests/