Gypsy Moth Portal

Wisconsin's resource for identifying, controlling, and managing gypsy moth
What is gypsy moth?

Aerial Spraying in Wisconsin

The Department of Agriculture, Trade, and Consumer Protection (DATCP) conducts aerial sprays to slow the spread of gypsy moth in western Wisconsin. Traps are installed prior to the appearance of adult moths to determine where small, isolated populations may be present. These populations are then targeted using aerial sprays every spring and summer. To learn more about the program and find treatment updates, visit the DATCP webpage.

During the spring and summer months, aerial spray information is frequently updated on the toll-free gypsy moth information line: 1-800-642-MOTH. Press 1 to listen to a recording about current gypsy moth spray plans. You can also subscribe to receive email updates about spray plans or follow DATCP on Facebook or Twitter.

The map to the right shows counties (in red) where aerial sprays are planned for 2021. Visit DATCP's interactive spray map to see where treatments are planned within each county and which products will be used.

Yard Tree Management

Homeowners who want to protect one or a few trees from gypsy moth should consult with a certified arborist for more information. Some options include spraying insecticides, scraping egg masses off surfaces or trapping them using sticky barriers.

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Woodlot Management

Woodlot owners should consult with a forester prior to beginning management. Some available options include doing a private aerial spray of the property or using active forest management to decrease defoliation impacts by improving tree health.

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State & Federal Quarantines

The quarantine covers 50 of Wisconsin's 72 counties primarily in the eastern 2/3 of the state. Under quarantine regulations, wood product and outdoor household items must be inspected or certified before moving them from quarantined to non-quarantined areas.

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