On Sat, 09 Jul 2016 08:07:37 +0100, Chris Hogg wrote:

On Fri, 8 Jul 2016 22:30:48 +0100, Big Les Wade wrote:

Spider posted

Sorry to rant at you, Stephen, but you really must get rid of that
knotweed before you regret it.


Doesn't glyphosate do it?

ISTR that the best way to treat it is, as you say, with glyphosate, but
specifically towards the end of the summer or early autumn, cut it off
at about 3 ft, and pour a half-strength glyphosate solution into the
hollow stems. The glyphosate is then slowly absorbed and taken down into
the root as the plant dies back in the autumn, never to emerge in the
spring.

It will take a couple of years of treatment to fully eradicate though so
don't expect to get it all in one go.

I daily drove past a 'colony' and watched as it was treated for, aprox, 3
years before it was completely eliminated. Its tough stuff!