Tim923 wrote in message . ..
This weed grows like crazy in upstate NY in Binghamton. Just how
widespread is this weed?

In our area, we call it Japanese Bamboo, our more commonly just
bamboo. It's so hard to get rid of it. It grows right back after
pulling or flattening. Did this plant overpopulate in Japan?

There seems to be a specialized biological control in its home country
(I think they may have identified a rust fungus) quite lacking in UK
and other infested areas. It's always called 'Japanese knotweed' in UK
vernacular; Collins Field Guide gives only 'Reynoutria japonica' as a
scientific name.

Mike.