Coral Spot is an incredibly common and widespread fungal disease that usually only attack dead or dying plant material.
It can, however, infect healthy living tissues of woody plants by infecting dead material that is still attached and spreading down the plant.
In healthy trees and trees, Coral Spot can cause dieback, although this symptom is uncommon in conifers. Another characteristic is the coral or red coloured pinhead-sized pustules that cover the infected material.
Unlike many fungal diseases, the pustules can be present year-round, so material that is infected is very contagious because spores are released throughout most of the year.