Problem with Cherry Trees

First off let me say these are two different kinds of cherry trees....

1) The first has grown very strange, very few limbs, almost no leaves and now it has black on the leaves (First 2 pics)

2) The other tree has white spots all over it now (last pic)

For the top picture, you might want to cut off the dead branches and see if the rest of the tree makes it through the year.  The white spots in the bottom picture look like a fungal infection (maybe downy mildew)?

Are these trees in a damp area that might foster fungal infections?

I am in South Carolina, even with the rain its been a hot summer, not damp at all...

Our cherry trees loose most of their leaves in august here.  It takes a couple years for ours to really get rooted.  Last year a new one looked like it was completely dead by September.  It totally filled out this spring.

Have you tried to scrape off some of the white spots,  say with a fingernail or something? They put me in mind of insect pests, either scales or one of the wooly aphids.

The one tree i just dug up today. Its roots never really got established it had alot of dead branches on it. I didnt think about trying to scrape off the white stuff because its everywhere...too much