I had a small shrub growing on top of a wall. I think it was
elderberry. I cut this down a couple of years ago, but it then regrew.
Unfortunately it has quite cleverly distorted the drain pipe, which
has added to the problem, but giving it a steady supply of water! I
have now cut it down and pulled out a rootstock about the size of a
fist. However there are still a few roots that go down into the wall
cavity and I doubt I will be able to remove these.
So, what is the best way to treat the roots, so they don't resprout. I
understand that ammonium sulphamate, which was sold as root out has
now been banned.
Appreciate some tips.
For elder, simply wait till new shoots appear and glyphosate them.
In fact cutting back to the ground will kill it too..have these pop up
all over the place: they don't survive even an annual mowing. In fact
not much woody stuff does.
Actually, very few perennials survive mowing..grass of course does, and
some weeds. Nettles brambles and elder dont.
I used some glyphosate in the spring in a similar situation and it
seems to have been very effective. Being a tightwad, I could see that
the powder at my local was a more expensive way to buy than a ready
made spray, even though the final concentration would be similar. So
I bought the spray to see what would happen and nothing's grown back
On Tue, 12 Aug 2008 05:20:59 -0700 (PDT), Tim Decker
Not exactly banned, rather not worth the company making the chemical
relicensing it, I think.
Glyphosate is still a licensed stump treatment and probably some of
the broadleaved herbicides containing trichlopyr, 2-4d (timbrel is
sodium chlorate will work but contaminate the area for a long time.
I have seen all the trees killed in an area by application of table
salt in May, it wasn't a lawful way of killing the trees though ;-).
Twenty years on there appear to be no side effects, though the
regrowth is largely birch rather than the pines that were there
It certainly works. To avoid contamination, drill a few downward sloping
holes in the side of the trunk with a flat bit. Spoon in some chlorate
then plug with a wine cork or similar. Or in the top of course if wide
OK, I only saw the stuff in small amounts in chemistry sets and as crystals
for disinfecting, I think it was used in public baths for treating foot
infections. Quite effective with spirit of salts IIRC ;-).
Saltpetre could be obtained in bulk then and the sodium chlorate didn't
have inhibitors in it! How did we survive before terrorists showed us our
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