Ash borer poised for assault on Arboretum at Experiment Station; Ottawa, Ontario, Canada

Experimental Farm prepares to battle emerald ash borer invasion
The pretty metallic-green bug arrived in Ottawa last year. Now, it’s poised to devastate ash trees at the Experimental Farm. And this is only the beginning. Kate Jaimet explains.
The Ottawa Citizen
June 15, 2009
OTTAWA — At the base of the arboretum’s woodland hill, near where the canal branches off from Dow’s Lake toward the Carleton locks, two magnificent ash trees tower over the scenery.

Their crowns are more than 30 metres high, and their age is a mystery even to J.P. Gratton, the supervisor and chief arborist of the Arboretum and Ornamental Gardens at the Central Experimental Farm.
"I would say they are native trees. They were here before the farm was created (in 1887), I think. But we have no proof of that,” he said.
One thing he knows for sure, though, is that these are two trees he wants to save from a deadly insect.