On Wed, 4 Oct 2017 22:40:48 +0100, Jeff Layman wrote:

The best way to
deal with it is repeated application of glyphosate (Roundup), and even
then it will take years to get rid of it completely.

Apparently injection is a good application method -- google "japanese knotweed
injection".

Looks like it would be very selective in applying the herbicide...


Thomas Prufer