Forester Jeff Wiegert of the New York State Department of Environmental Conservation points out the markings left from emerald ash borer larvae on an ash tree in October at Esopus Bend Nature Preserve in Saugerties, N.Y.
This is an emerald ash borer.
Courtesy of Professor James Appleby
About this Article
Triangular, purple kite-like contraptions placed in trees across the country are helping state and federal agriculture officials learn more about a deadly beetle that has killed tens of millions of ash trees in the United States and Canada and threatens countless more.