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The Iowa Tree Pests website was designed to be an up-to-date source of information for Iowa, and for any person who wants to learn more about invasive tree pests. There currently are several invasive insect and disease pests on the horizon, not only of great concern for Iowa and the Midwest, but also the entire United States.

Washington State Department of Agriculture (WSDA) detected two Japanese beetles near Grandview and one near Sunnyside in 2021. Additionally, a resident reported numerous Japanese beetles devouring her roses in Grandview that summer.

Japanese beetles would pose a serious threat to farms, gardens, and the environment if they were to become established in Washington State. Please report any suspected sightings of Japanese beetle at PestProgram@agr.wa.gov or 1-800-443-6684. See WSDA's Interactive Japanese Beetle Response Map.

The Japanese Beetle was discovered in Mesa County in the summer of 2022. The Colorado Department of Agriculture has been working in partnership with local stakeholders to eradicate the pest and prevent its spread into additional areas of Colorado. 

See also: Pest Alerts for more pests

We need your help to monitor for and report northern giant hornet sightings. By participating in a northern giant hornet citizen scientist project, you are helping protect your community from northern giant hornets.

Since the first report of a northern giant hornet in Washington in 2019 (known as the Asian giant hornet or the “murder hornet” back then), the Washington State Department of Agriculture’s (WSDA) Pest Program has been working to eradicate northern giant hornets. The best time to participate is from July through November. You are most likely to see or catch a northern giant hornet during this timeframe because colonies are established, and workers are out hunting.

See also: Invasive Species for more resources

See also: Plant Disease Watch List for more resources