One of the largest old elm trees in Toronto — possibly in all of southern Ontario — is on its last legs. But as the city ...

Joel Harrison-Off, the acting supervisor of the city’s forest healthcare and management, said the tree is one of the largest native elm trees in Toronto and was one of the few survivors of Dutch Elm ...

Dutch elm disease was found in Edmonton for the first time. Since its introduction from Europe to North America in the 1930s, ...

It’s not just your imagination, Winnipeg has dodged cankerworm season. For the rest of the summer, residents can relax under ...

Because the most common cause of this yellowing is iron deficiency, the disorder is called iron chlorosis (pronounced klor-OH ...

As Australian cities heat up, street trees are needed more than ever for their cooling. It turns out many are more resilient ...

A giant elm at Christie Pits is "nearly dead." But as CBC's Michelle Song explains, its genetics may be preserved.

Arborists from the Grand Rapids Parks and Recreation Department will start treatment on a group of oak trees in Aman Park infected with oak wilt.

Cultural relic restorers repair palm-leaf manuscripts in the cultural relic restoration room at the Potala Palace on May 25, ...