I can. That is one of the pests that the Canadian Food Inspection Agency is dealing with. Ontario is contributing quite a bit in terms of supporting all the monitoring.
It was detected near Pearson International Airport, suspected to have come in in packing materials that were not suitably treated. There was an infestation identified, thousands of trees were cut out of that area, and then there was a series of five years' worth of surveys to try to determine whether we got them all. Subsequent to that, there was another find, so we're back into another series of monitoring exercises.
One of the challenges that gets highlighted with the invasive species—and I'm thinking about research from the U.S. for emerald ash borer or from other places for Asian longhorned beetle—is that we don't know what insect might show up on our doorstep, so we can't do the research ahead of time.
The Canadian Forest Service did some fantastic work associated with one of the most effective pesticide treatments for emerald ash borer, which is being implemented in Oakville and other municipalities, and that is TreeAzin. That was developed at the Great Lakes Forestry Centre and is being used to treat street trees.
Another issue you're highlighting is that in the urban environment trees are very valuable. Management techniques are totally different from when we're out in the forest. The urban environment is a disturbed environment already, so when you take out those trees, as you indicated with buckthorn, you have a new invasive species that will come in and take over. That is probably a more prevalent issue than in the natural forest situation, because there are other species that would jump into that situation.