what is the best way to treat grey rust on my sweet peas
By Rastusmouse
United Kingdom 
is anything that can be used to eradicate it?
On plant
Lathyrus
21 Jul, 2009
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Grey rust? I think you might mean mildew, which is greyish white - rust is always rusty coloured or mustard yellow or orangy. Either way, what you need is a fungicide - get one that treats mildew
21 Jul, 2009