On Sat, 25 Aug 2012 08:18:38 +1000, "David Hare-Scott"
wrote:

Brooklyn1 wrote:
"David E. Ross" wrote:

If you really want to kill the ivy, apply Roundup to the foliage
with a sponge or brush, which will avoid damaging the tree on which
it is growing.

That's much too risky. The ivy will quickly draw the Roundup deep
into it's roots where it will be deposited in close proximity to the
tree roots, whereby it will severely damage if not kill the tree.

How do you know this?

The same way most folks who possess common sense know such things,
from experience. I've personally done exactly what you propose to an
old wisteria vine growing too close to my back garage door and a short
time later noticed the leaves on my holly bush growing on the other
side of the fence were shriveling. So how many times did your mommy
have to tell you the stove is hot before you burned yourself...