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Spongy Moth Population Increases for Third Consecutive Year in Wisconsin

 

December 8, 2022

Graph courtesy of the DATCP

This graph shows the average number of moths caught per trap over the past ten years.

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) caught 202,300 spongy moths (formerly named gypsy moth) in 10,044 traps this summer as part of the federal Slow the Spread of the Spongy Moth Program.

"Wisconsin weather trends have allowed the spongy moth population to grow over the last several years," said Michael Falk, DATCP's Trapping Coordinator. "A lack of extreme cold events has allowed many spongy moth eggs to survive the winter, and a steady trend of warm, dry summers has limited the impact of diseases that normally kill spongy moth caterpillars."

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