"Charlie Pridham" wrote in message
...

"Roscoe" wrote in message
...

"Annabel" wrote in a message:
I believe I saw that you can spray a plant that is infested with
oil..
Can someone please enlighten me about this as I can find nothing
with a
web search.

Annabel
----------------------
Hi Annabel.

The oil in question is Tar oil which should be applied during the
winter
months only. Red spider mites thrive in humid, dry conditions and
loathe
water, so forget the Tar oil and get spraying. I used to control
them with
Derris dust but not now as using it also controls the predators.

Roscoe

There have also been trials of spraying with a veg based oil during
the
growing season, I have not found out which oil, but live in hope! :~)
It has
apparently been very successful in california it works by gluing the
blighters to the leaf, sounds good to me!
--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)


This was the kind of thing I was looking for.

Bel