The Minnesota Department of Agriculture has been monitoring (trapping) gypsy moth since 1970 and has successfully eradicated a number of small isolated infestations. In 2004, four Minnesota counties were added the slow the spread program because of high trap counts. In recent years, MDA has captured high numbers of male moths along the North Shore of Lake Superior. Based on moth capture rates and the presence of alternate life stages, MDA has proposed a quarantine in Lake County.
Although gypsy moth will eventually become established in Minnesota, control efforts can minimize and delay the impacts caused by gypsy moth on our forests, saving the state millions of dollars in additional control costs and lost business in recreation and forest industry sectors. Control efforts also slow the spread of gypsy moth to other parts of the state that may be more susceptible to gypsy moth feeding. Currently gypsy moth populations are low in Minnesota, and it is important to keep these populations in check. The diligence of the Minnesota Department of Agriculture over the past many years has made possible the eradication of small infestations of gypsy moth, keeping Minnesota essentially free of gypsy moth. The DNR supports the Minnesota Department of Agriculture's proposed treatments to delay establishment of gypsy moth in Minnesota as long as reasonably possible.