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.

Cornell is at the forefront of determining how "invisibility cloaks" and walls of protection may give ash trees hope of revival.

The emerald ash borer, an invasive beetle from Asia, is damaging trees in the Upstate. Suspected sightings should be reported to local authorities or Clemson University. An exotic beetle is chomping ...

The emerald ash borer, a tiny yet destructive invasive beetle known for wiping out ash trees on a large scale, has been confirmed at six new locations in northwest Oregon. First discovered in Forest ...