Here is a quote from an article I read this week:
“Conservationist should assess organisms on environmental impact rather than on whether they are natives…” June 9, 2011 Nature
I thought that this would make for an interesting conversation among the weed warriors in the group that have been pondering the management issue.
Personally, I am on the fence. It can take years to collect enough data to be able to say with any certainty that a species has a serious environmental impact. By then, the invasive may be well established and more difficult to eradicate. On the other hand, spending money to control a species that ultimately would have had no significant impact is a waste of limited land management resources.