Genes in green ash trees that may confer some resistance to attacks by the emerald ash borer express themselves only once the tree detects the invasive beetle's feeding, according to Penn State ...

"Lingering ash." That's what the U.S. Forest Service calls the relatively few green and white ash trees that survive the emerald ash borer onslaught. Those trees do not survive by accident, and that ...

Leaves – Similar to Fraxinus americana, but leaflets often narrower and always with some serration; opposite, deciduous, pinnately compound with 7-9 3-4” leaflets; ovate with smooth margin; more or ...

SALISBURY — Pulling back the flaking bark of the green ash tree with the ease of someone peeling an orange, Jay Bolin exposes the evidence he expected to find. “Look at those D-shaped exit holes,” he ...