This is pretty neat, not only for the focus on friendlier ways to control Knotweed, but also for the interactive map that shows how it's spread from 1890 to the present day... Worth reading! http://news.bbc.co.uk/2/hi/science/nature/7531221.stm
But didn't they use Rose Rosette Disease to try an dcontrol Rosa multiflora in the States? And it's now emerging to plaque gardeners and the rose growing industry? I must say that time lapse video of a JK growing is scary!