ned wrote:
:-))
Well, I've said it before and I'll say it again.
Roundup mixed with washing up detergent, spot sprayed on the plant
will cause the plant to die back but do not remove the apparently dead
stems until they are brittle and can be brushed away.
A second application on any regrowth may be needed, but,
in my experience (!!!)
it works.

Alright ... there's a cure - but roundup's bad in my books. So I'll let
you have the soap box ;o)