By Mark_barnes
United Kingdom 
Hi I have a Victoria PLum tree that is very sick. The leaves are dying back, they are a slivery green and have stunted growth. There are two photos to show the current situation. Some branches on the NW side have died completely.
Also the north face of the bark has this brown/copper type lychen on the bark.
On plant
Victoria Plum
15 May, 2011
Answers
I think the lady is right too.
15 May, 2011
Never seen myself just sounded right...
15 May, 2011
I believe you can get the infection if you prune at the wrong time.
15 May, 2011
Yes you can, if you prune a plum tree in late autumn the 'spores' (wrong word)can get into the cut tissue.
15 May, 2011
It is a fungus so 'spore' is the correct name for the way the infection (definitely the wrong word) is moved from one place to another.
16 May, 2011
I think you have 'silver leaf' disease, copy and paste the link below into your web browser for the RHS info
http://bit.ly/jT6lTu
15 May, 2011