US - NorthEast

A 2011 photograph from Wisconsin shows what damage the larvae of the emerald ash borer are doing to ash trees in the United States. Credit John Ehlke/The West Bend Daily News, via Associated Press

nytimes.com - by Maggie Koerth-Baker - June 30, 2014

This past winter was the coldest Detroit had experienced in 36 years. Across the upper Midwest, cities shivered, and more than 90 percent of the surface area of the Great Lakes froze solid.

It seemed like ideal weather to kill an unwanted insect. But it did little to stop the emerald ash borer, an invasive Asian beetle that is devastating ash trees from Minnesota to New York.

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