Emerald Ash Borer makes its way north, found in Superior, Wisc.

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The destructive Emerald Ash Borer has been found in Superior, Wisc., the first such infestation in the northern part of that state and pretty close to neighboring Minnesota.

The voracious bug has been found in the City of Superior - the most northern location to date in Wisconsin for the invasive bug, state officials said Thursday, reports the Milwaukee Journal Sentinal.

The Journal Sentinal also notes the Wisconsin Department of Agriculture, Trade and Consumer Protection said that a quarantine prohibiting ash products and hardwood firewood from leaving Douglas County has been put into effect.

A quarantine has been placed on Ramsey, Hennepin, Houston, and Winona counties in Minnesota, according to the state's DNR web site.

Minnesota Public Radio reports on what Duluth is doing in wake of the news.

The Northland News reports that officials in Superior surveyed about 3,000 ash trees in the city and are worried that trees that have been hit by the insects will start dying within one to three years.

Until now, Trempealeau County, north of La Crosse, had been the northernmost Wisconsin site where the invasive beetle has been found, according to the Milwaukee paper. The other nearest locations to Superior where the bug has been spotted are St. Paul and the Keweenaw Peninsula of Michigan's Upper Peninsula.

Emerald Ash Borer harms ash trees because the larva feeds under the bark of trees, cutting off the flow of water and nutrients. The adult beetle is a dark metallic green and about one-half inch long.

There's a nationwide battle to limit the spread of the bug, but just this week there were new sightings in New Hampshire and upstate New York.

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