A pile of Russian thistle, or tumbleweeds, tangled up under a stand of western Joshua trees on the Transition Habitat ...

The column from April 25 in which I described pest threats to our trees sparked a lot of interest.

At a bend in Zambia’s Kafue River, the bicolored waterberry trees resemble an avenue planted along a city boulevard. Their ...

The invasive emerald ash borer beetle is confirmed to be in five new Texas counties, the Texas A&M Forest Service says.