Clark County added to gypsy moth quarantine zone | Plant Pest Modeling |

Trapping data and field surveys indicate that the gypsy moth, an invasive insect that favors a diet of oak leaves, is reproducing and taking hold in three more Wisconsin counties.


Gypsy moth was brought from Europe to the Boston area in 1869 and has since spread into much of the Northeastern and Midwestern United States and Canada. It was discovered in Wisconsin in the late 1960s. Counties in eastern Wisconsin were placed under quarantine starting in 1993. The leading edge of the gypsy moth infestation now stretches from Rock County to Bayfield County.

“If we did nothing to control the gypsy moth, that leading edge would’ve been through Wisconsin and into Minnesota now, with much more damage done. We will continue our work to eliminate isolated outbreaks in non-quarantined areas and slow the spread of gypsy moth across Wisconsin,” Kuhn explained (director of the Plant Industry Bureau at the Wisconsin Department of Agriculture, Trade and Consumer Protection).