The Entomological Society of America (ESA) has discontinued gypsy moth as the common name for Lymantria dispar and is in the process of determining a new common name for this species. Thank you for your patience and understanding as we transition through the name change process.
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Gypsy Moth (Lymantria dispar) 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.

Map of Wisconsin showing counties in red that are being sprayed in 2021