TheSeedObsesser
Deeply Rooted
You could try ducks. We had a high population of ducks in our poultry-yard for a while and it turned the area into wasteland. The soil line in the poultry yard was a good 6 inches below the rest of the yard too.
Ridgerunner said:Fence it off and raise pigs in there. Make sure the population density is pretty high so it's all turned to a wasteland for the entire season. But that only helps the area you fence off temporarily. It'll spread and re-seed from outside.
I don't have that stuff for which I'm grateful. My battle is mainly with Bermuda grass.
I'm always pondering its next move and how I'm going to somehow kill it. I piled about 10" of bark mulch around my blueberries last spring and it took no time at all to come up everywhere in it. That patch had landscape fabric under the mulch too. It just comes right up through it or over top of it. 
Can you just picture the look on the realtor's face?