By Paulinep
Merseyside,
United Kingdom 
I have a Norwegian Maple and the leaves have developed brown spots on them and lots of the leaves have fallen off. Could anyone please tell me what could be the cause of this.
Many thanks PaulineP
27 Jul, 2015
It might be Acer tar spot, for which there isn't really any treatment and which doesn't kill the tree. Link below for more info
https://www.rhs.org.uk/advice/profile?PID=750
27 Jul, 2015