OLYMPIA, Wash. – The Washington State Department of Agriculture (WSDA) is beginning its annual search for pests that could threaten the state’s environment and agricultural industry. Staff will set thousands of traps statewide to monitor for the introduction or spread of more than 130 invasive pests and diseases, including spongy moth, Japanese beetle, apple maggot and northern giant hornet.
While eradication treatments are ongoing through June, trappers have already started setting the first Japanese beetle traps in the Grandview and Wapato areas where they caught more than 23,000 beetles last year. Trappers will also place approximately 20,000 spongy moth traps and 5,000 apple maggot traps this summer. Both spongy moths and Japanese beetles attack more than 300 different types of plants, which could be devastating to the environment and agriculture should they become established.
Trapping for northern giant hornet worker hornets will not start until July, when workers become more active. WSDA will trap exclusively in Whatcom County. However, the agency will also be encouraging citizen scientists to trap for these invasive pests again this year, especially in Whatcom, Skagit, San Juan, Island, Clallam and Jefferson counties. Public hornet trapping instructions are available on WSDA’s website.
WSDA is still asking residents to report all suspected hornet sightings. Northern giant hornet queens should be active now and could be spotted while they establish their nests. As the colony grows, worker hornets may become increasingly visible throughout the summer and into the fall.
“We’re not out of the woods yet,” Sven Spichiger, WSDA acting pest program manager, said. “Although we didn’t confirm any hornets last year, it is too early to let our guard down. They could still be out there.”
Public reports account for more than half of Washington’s confirmed hornet sightings. Suspect hornet sightings can be reported at agr.wa.gov/hornets, via email at hornets@agr.wa.gov, or by calling 1-800-443-6684. While all reports are encouraged, a photo or specimen is necessary for confirmation.
WSDA has spent decades monitoring for invasive pests that threaten agriculture or the environment. Agency trapping efforts combined with public reports have prevented invasive pests such as the spongy moth and citrus longhorned beetle from establishing in Washington and devastating trees, forests, parks, farms, and gardens.
— WSDA