@Stevo
Wow I am sorry I missed this post and I dont know why no one responded......
The tree pictured above appears to have a VERY bad case of scale, or maybe wooly aphids or adelgids (cottonly look but cant tell for sure its not entirely clear).
From the looks of things, it could be both scale and adelgids or wooly aphids. That is not a fungus, so fungicide will do you no good AT ALL.
Those are all insects and if if your tree is infested as badly as the one above, you need to implement an insecticide that will kill scale, and adelgids.
Dont monkey around with insecticidal soap or milder treatments with it this bad, get the strong stuff that will kill scale and use it.
That tree is getting drained fast and it needs to be dealt with fast.