On Thu, 30 Jul 2015 20:42:38 +0100, David Hill wrote:

That was one of the main thing treated by lime sulphur in the old days

Treat with any copper based product, or bordeaux mixture, like this

http://www.amazon.co.uk/Agro-Sens-Bo...ncentrated/dp/
B00OUZ3T0O/ref=sr_1_3?ie=UTF8&qid=1438294717&sr=8-3&keywords=bordeaux
+mixture

If the link isn't legible search amazon.co.uk for bordeaux mixture, this
was the 3rd link.

Note not proposing you buy this one! But will give you the idea.




--
Gardening in Lower Normandy