As part of the city-wide effort to combat the emerald ash borer, city staff are in the process of identifying 800 "high value" ash trees qualified for insecticide treatment, an alternative to tree ...

Every now and then a tree problem suddenly emerges that result in dozens of calls and e-mails. The tree in question is Mancana ash - a variety of Manchurian ash. I wrote about problems with this tree ...

Charlottetown Rural High School students took a field trip behind their school Wednesday to make a mark on P.E.I.'s ecological and cultural landscape. The students were planting black ash trees. Once ...

British woodlands appear to be evolving resistance to the invasive fungus causing the devastating tree disease ash dieback, scientists have said. Researchers from the Royal Botanic Gardens, Kew, and ...

Bark beetle infestation is a leading cause of tree death in the United States, and as the climate warms, trees weakened by drought are more and more susceptible to being taken out by a growing plague ...