The new thing is to lay 1/2” hardware cloth over the area and let it grow through it. It keeps girdling itself as it grows. Not sure that would eradicate it with time though as it doesn’t need much photosynthesis to refuel the rhizomes.
I needed to hit it last year when it first germinated…may alert the town. They make a halfhearted effort every summer to nuke it only for it to grow right back before fall.
It’s pretty bad here too. There’s a big patch of it down the road along a stream that feeds into the Winni River. Last year a patch sprouted up roadside halfway up my hill and I’m tempted to roundup that shit myself before it starts spreading.
I’m downwind of Winni on NE flow so it stabilizes me in these self destructive sunshine days in spring and we stay mostly sunny. You can see it downwind of Sebago too on vis.