The emerald ash borer is an invasive beetle wreaking havoc on America's ash trees. We explain how it got here and how it is being tackled.

Cleanup is underway in Garland’s Western Heights neighborhood. But rather than remove countless Arizona Ash trees killed by a winter storm several years ago, Kevin Roach has been busy enhancing them. ...

The invasive emerald ash borer, according to the U.S. Department of Agriculture, was first found in the United States in southeast Michigan in 2002. In the decades since, the wood-boring beetle has ...

Winter isn’t the ideal season for pruning trees in Upstate New York, but it’s the best time to cut scion or twigs from ash trees in parts of the state where the species has been all but wiped out.

Samples for the study were collected by researchers from Penn State, the Forest Service and other partners around the Oregon ash range, extending from California, Oregon and Washington into British ...