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Martin Brown · 25-10-2010, 09:09 AM posted to uk.rec.gardening

On 24/10/2010 17:45, Rusty Hinge wrote:
Janet wrote:
In article f736284e-2ca4-4c2a-9455-a5e3a9ca7581
@k22g2000yqh.googlegroups.com, says...
On 23 Oct, 22:15, Janet Tweedy wrote:
In article , Martin Brown
writes

Why buy it now? The weather is already too cold for it to have a full
effect - applied at this time of year is a waste
Many of the more stubborn weeds inc. Japanese Knotweed are
considered to
be more likely to be affected by poison if sprayed as they are winding
down for the year as they take the stuff into the roots.
--
Janet Tweedy
Dalmatian Telegraphhttp://www.lancedal.demon.co.uk
There is the alternative that you never hear of now which is to mix
the concentrate with parafin. Penetrates a lot better.

I've only heard that in relation to woody stump killers which iirc are
not glyphosate.

Glyphosate weedkillers are applied to growing green leaf and
translocated from leaves to roots; it's hard to see how adding oil
would increase leaf absorption.

It won't AFAIK - washing-up liquid often helps with glossy/waxy-leaved
plants such as ivy, and ISTR it being suggested for ground elder and
Japanese knotweed

That also sounds like an urban legend since the commercial formulations
already contain far more powerful and noxious surfactants. It doesn't
touch ivy seedlings though which are notable survivors.

The handful of idiot deaths from glyphosate weedkillers are due to the
surfactant toxicity and not the active ingredient!

Ground elder gives up the ghost pretty easily you just have to keep at
it. Never letting the plant see the sun is the key.

Regards,
Martin Brown