I share your concern Latt. I have places where I used to hunt turkeys where GMustart grew like grass and you couldn't see a bird coming in after the second week of the season.
It is definately an issue with our woodsgrown operations. I've noticed that garlic mustard germinates after tilling the beds with the new ginseng in the spring. There were years where my beds looked more like mustard beds than ginseng beds. I used to spend days in the woods in April pulling the stuff and piling it up to dry out and die.
I\"ve considered the concept of a wick system like they used to use in bean fields to kill corn and other taller weeds. Basically, they would mix a tank of Roundup, and let it flow into a horizontal pipe with wicks horizontally across the surface in the front. Therefore, they would not be spraying the herbicide, but it was available on the surface of the wicks and coated the plants that it brushed over. Just set the wick higher than the beans and lower than the other weeds so they get good contact (and a good coating) with the wick beam.
I\"m sure we both wish a wizkid in a college lab will come up with some biodegradable and completely non-toxic to anything but garlic mustard, chemical that we can spray all over the woods with 100% success and it only costs $2 a gallon. ....but unfortunately, I'm holding not my breath.