It sounds like spider mites.

You need a pesticide that is effective on spiders as most insecticides won't
eliminate them.

The black dots are hard to diagnose with the limited description. Are they
on the top or bottom of the leaves?
It MIGHT be black spot or anthractnose.

Tim



"Mercy" wrote in message
...

Maybe a few of you will remember my mini roses that were drooping - they
soon came back to life and looked gorgeous after advice I was given.
Well they're suffering again! Even though a trusted friend was looking
after them and did her best, I returned to find them looking dry and
crispy, although they seemed to have been watered as they should.

They're covered in a canopy of webs, which I assume is from a spider,
or in this case hundreds of teeny tiny spiders. Could these be
affecting the plant? They're not much bigger than a milimetre long,
with a dark brown body and light, translucent-looking legs and heads -
are there any other creatures that make webs - it's a blanket sort of
web - or are they newly-born spiders?

There are also little black dots on the leaves - is this a related
problem? I don't really want to kill them if they're spiders but there
are hundreds of them - will they affect the plant in any way? If
they're not spiders, how should I get rid of them?

I think I will take my roses with me when I go away in future...

Mercy


--
Mercy