By Jmills
United States 
I have ugly black patches on my established shrub, is it black spot ?
14 Apr, 2015
Answers
depends on which shrub too. it could be sooty mould if your shrub has aphid or scale insect. they secrete a sugary waste that then provides nutrients for various fungi/moulds.
15 Apr, 2015
Close up photo would help
14 Apr, 2015