In article ,
says...
What evidence is there for this?

http://www.telegraph.co.uk/earth/365...ust-warns.html

Or is it the National Trust just scaremongering to get rid of plants
it dislikes?

If oaks have the disease should they not be culled?
Angus Macmillan
www.roots-of-blood.org.uk
www.killhunting.org
www.con-servation.org.uk

All truth passes through three stages:
First, it is ridiculed;
Second, it is violently opposed; and
Third, it is accepted as self-evident.
-- Arthur Schopenhauer (1788-1860)

Whether you like them or not the Rhodos were originally planted to
provide cover and wind shelter in the big gardens in Cornwall and
elsewhere, unfortunately they are very successful at doing this and the
still humid atmosphere they create is ideal breeding ground of the
several species of Phytophora fungi now on the rampage and the list of
plants attacked is now above 500, Oaks in the uk are hardly effected but
it has decimated some gardens and is almost out of control. Its not just
the Rhodos being removed its all the understory planting like Laural,
bamboo and Hydrangeas, they are also raising the lower tree branches to
improve air circulation.
I fear they may already be too late and we are witnessing something that
will dwarf the effects of Dutch elm disease, it also effects perennial
plants and some moorland heathers are starting to go.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea