Tim, I have not observed invasive behaviour, but that's because I have remained on top of it, gradually eliminating the problem over five years. The bulbuils may remain dormant for more than a year. Andrew - Having read the proposals from the USDA, it think it would be naïve and potentially disastrous to expect them to use any kind of logic in their determinations. Andrew, you have not observed any kind of invasive behaviour, correct? T