First Japanese beetles of the year detected in Grandview

GRANDVIEW - The Washington State Department of Agricultures (WSDA) has detected their first Japanese Beetle for 2023.

The beetle was detected in a trap near the Grandview High School on Tuesday, June 20.

In 20222 the larvae for the beetle were first detected on June 13, the larvae were detected in the garden of one of the residents within the infestation area of Grandview. After confirming the specimen was the beetle the WSDA installed traps surrounding the property to capture adults if they were to emerge, the traps are used as a way to monitor how far the beetle infestations have reached.

Japanese beetles are not native to Washington and threaten more than 300 plants, including roses, grapes, hops, apples, and grass. In 2021 WSDA trapped more than 24,000 beetles in the Grandview area and last year WSDA deployed 2,229 traps to capture any emerging adults.

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