Travelling across Ireland, it is hard to ignore the lines of dead and dying ash trees in the hedges.

Minnesota's Department of Agriculture is releasing wasps in areas with known emerald ash borer infestations, hoping to slow the spread of the deadly pest.

The Common North American Ash Species seven75 / Getty Images Green and white ash trees are the two most common ash species and their range covers most of the Eastern United States and Canada.

DNA sequencing shows young trees are more likely to have gene variants that confer partial resistance to a fungus that has been wiping out ash trees across Europe ...

An invasive beetle that kills ash trees has made it to the Nashville area. As a result, up to 13% of Tennessee's trees could ...

If your ash tree’s canopy is thinning, bark is flaking off in patches, or woodpeckers are suddenly interested in your trunk, ...

Have you noticed discoloration on your maple tree leaves this year? You aren't the only one. Here's what you should know ...

The Emerald Ash Borer has been detected in Denver nearly a decade after city officials began preparing for the invasive ...

The emerald ash borer, an invasive insect that’s killed millions of trees across the United States, was found in several ...

For decades, development, disease and insect infestation have chipped away at the tree canopy, leaving Twin Cities ...

Ash trees are dying by the thousands in south-central Minnesota. Chainsaws are roaring as government workers struggle to keep up. And tree experts warn that 2025 will be much worse.

Altogether, Louisville's parks have thousands of trees. Oak, maple and ash trees are the most common in the Derby City.