Again, that will depend on what we know about the biology of the species and how quickly it moves naturally versus human-assisted movement. It would depend on how established a particular pest is.
A risk assessment would be done to determine the likelihood of success if we wanted to go the eradication route, as we did early on with the Asian gypsy moth in Vancouver and Toronto. That would involve regulating the site. In the case of Toronto, we cut down many of the host trees so that the Asian long-horned beetle would not have a source of food. Then we do monitoring and surveillance for five years, and we follow international standards and commitments to be able to declare that we've successfully eradicated that pest.
In other cases, as with the brown spruce longhorn beetle, we have a strongly established pest that we're not in a position to eradicate because of the associated costs. We understand and appreciate that the pest itself moves at a certain rate that is greatly accelerated by human-assisted movement, whether it's from logs moving between sites to a pest-free site or from firewood, so we put restrictions on those sites to slow the spread because we know the natural biology of the pest means it will move slowly. We buy time by not accelerating that movement with human intervention.