it sounds like powdery mildew, its all over this year due to the weather,it
will probably be on perennials which will be dieing back anyway so I
wouldn't worry about it ,just cut them back . they will come back with fresh
new growth,you can spray with chemicals earlier in the year to try and
control it but I have found it doesn't really work,it just delays.I just let
the garden get on with it!
keith
"Ophelia" wrote in message
...
A while ago when my peas were finished I noticed there was what looked
like
a white powder on the leaves. I noticed that some of the weeds that have
grown near there, which I went to clear out, have it too.

I am sure everyone except me will know exactly what it is but not me

Is this something that will spread? What can I do about it?

Ophelia