use a gel glyphosate (systemic) weedkiller which u paint onto the
leaves - it says cover all the leaves with it but i find if u get 50%
of coverage and no rain it kills the plant.
preferably u dont use a chemical solution but with PI that means
regular (weekly during growing cycle) cutting to base - v. difficult
with ivies but eventually effective e.g. 70% first year and the rest
in three.
cheers Rich
(and yeah the urine thing is not going to work)