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Gypsy moth suppression program

Gypsy moth suppression program deactivated

About the deactivation

On August 8, 2018, the DNR’s gypsy moth suppression program was deactivated by the Natural Resources Board. The program helped suppress localized gypsy moth outbreaks with aerial insecticide treatments at the request of quarantined counties, where gypsy moth is considered established. It was ended because of a decline in requests and the emergence of private-sector alternatives to federally subsidized spraying.

Other suppression programs

In unquarantined counties in the western part of Wisconsin where small, isolated populations of the pest are just starting to emerge, another program called Slow the Spread (STS) run by the Department of Agriculture, Trade and Consumer Protection (DATCP) continues. The STS program is not voluntary and DATCP does not take landowner or municipal requests for sprays.

Quarantined counties

The counties in red are considered quarantined counties, where gypsy moth is considered established. in quarantined counties, products that can carry gypsy moths must be inspected and found clean before they can be shipped to areas that are free of gypsy moths. Learn more about the gypsy moth quarantine.

Map of Wisconsin with gypsy moth quarantined counties in red

Download the quarantine map for printing.

More information

For information on how individuals and communities can manage gypsy moths, visit:

Last revised: Monday October 08 2018