I notice several sycamore trees of mine and my neighbours are suffering from branches which have completely died back. I have checked on the net and nothing seems to replicate the problem. The rest of the tree looks healthy.
14 Aug, 2016
One thing I came up with on google is Verticilium wilt on acers (sycamore) try googling it
Its a soilbourne fungus ?
14 Aug, 2016