I have a Boskoop Glory vine in the green house that I planted last Nov. New shoots are appearing but it has tiny white/opaque spots on them, What are these and how do I treat it.I have blackcurrant bush in garden. I found a leaf with blisters on it, only one leaf. What is this and what should I do?
Blister leaves are usually a sign of greenfly on the back of the leaf. It it not a major problem and usually ladybirds and oterh predators sort it out, unless there is a heavy infestation when you might take control measures.