Find out about common North American trees with pinnate leaves. Learn how to identify hickory, ash, walnut, black locust, and pecan using this guide.

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

Question: My ash tree and sycamore tree are losing leaves, which are somewhat disfigured and have blackened areas on the leaves. What should I do?

The damage is invisible at first, but it doesn’t take long for the leaves to wither, the trunks to weaken, the once-vibrant ...

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

Species like spotted lanternflies, zebra mussels and wild pigs are popping up around the commonwealth. Here's how to handle ...

In heavily affected areas, up to 30% of beech trees are killed within seven years of contracting beech leaf disease.

The Oregon Department of Forestry is warning Oregonians about an invasive species of beetle that could emerge this summer.

In a video still from June 2024, Jordan Bartosz with the Oregon Department of Agriculture explains the distinctive leaf pattern of of an ash tree, which can help with identification.

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 ...

The emerald ash borer, an invasive pest that kills ash trees, has been detected in 13 Vermont counties and is still spreading. But towns often don’t have the budget, or the guidance, to address it.

Lastly, Skinner says it’s important to distinguish ash trees (Fraxinus spp.) from other species with similar-looking leaves.