The Washington State Department of Agriculture (WSDA) is proposing a multi year Japanese beetle eradication effort in parts of SeaTac beginning in 2026, offering free insecticide treatments to affected properties pending available funds.

According to WSDA officials, the program is designed to protect local businesses, landscapes and the broader economy from the long term impacts of the invasive pest.

The Japanese beetle feeds on more than 300 types of plants. In areas where it becomes established, the insect can damage lawns, landscaping, gardens and agricultural crops, often resulting in costly and ongoing treatment requirements for property owners and businesses.

Under the proposal, WSDA plans to offer free insecticide treatments to affected public and private properties within designated treatment areas. Treatments would require annual consent from property owners and businesses.

Landowners within the proposed treatment areas will receive letters from WSDA requesting consent to treat their properties. Participation is intended to help prevent long term infestation and avoid more expensive treatment requirements in the future.

The effort is part of WSDA’s broader work to protect community resources and local economies from invasive species. The Seattle Southside Chamber of Commerce is helping share information about the proposed program so members and local businesses are aware of the effort and can make informed decisions if contacted.

More information about the proposed 2026 treatment areas and the Japanese beetle eradication program is available here. A treatment area map (included below) and details about past and planned efforts can also be found on the department’s website.