Kris Dullmer of Ash Tree Solutions, right, injects an insecticide into an ash tree named Big Jim in the Catamount Community Forest to combat the emerald ash borer in Williston on Tuesday, June 25.

The emerald ash borer is a small, green beetle that has killed tens of millions of ash trees since it was introduced to the U.S. from Asia in 2002. Ash borer larvae feed on vascular tissues under ...

Ash tree's used make up 40% of the trees in Fargo; it's now down to about 20%. "We're making big progress to start mixing it up and prepare for future problems that we don't foresee yet, but we'll ...

In 2006, Kathleen Knight was walking through a forest in northwest Ohio. She's a researched ecologist with the U.S. Forest Service. All around her were big, beautiful ash trees, tall trunks with ...

Nope. This photo shows big leaves from a healthy ash tree at the top and small leaves of an ash tree damaged by emerald ash borers at the bottom. (ISU Extension - Courtesy Photo) ...

Ash trees are a valuable part of our forests, where they provide habitat to all types of creatures. To help protect the tree from extinction, researchers at NC State have enlisted an old enemy of ...

This photo shows the side view of an adult emerald ash borer. The invasive beetle is native to Asia and has killed more than 100 million ash trees in the U.S. since its arrival in 2002.

Dead ash trees are seen at Buttercup Farm Audubon Sanctuary on June 4. Since 2009, the vast majority of white, black and green ash trees have been wiped out by an invasive pest.

Ash tree removals are an expensive burden caused by an invasive beetle. A new grant will help Minneapolis homeowners cover the costs, but many feel more must be done for people currently paying ...

"When you look out of your house at a tree that has been there for 80 years and you come home and it's gone. It gets emotional," said Liudahl, who tries to keep his eye on the big picture.