Ornamental cherry trees, help identifying issues please
Can anyone offer some diagnosis of problems we have on two cherry trees please? Google hasn't been much of a help... nothing I've read about matches up.
In the last couple of weeks we've noticed leaves on the smaller one are yellowing and dying (following 4 photos). Closer inspection found there's a dark red fungus/mildew on the underside of them. It's slightly raised. The problem has spread far, across the bottom half of the tree.
The larger tree (which does need a good cut back) has mouldy-looking cherries this year. They're almost mummified where they hang. Only a few are actually red. Most are shriveled and white. The leaves don't look healthy either. They're covered in a sticky substance and are holey. There's white flecks on them too which I thought was a sign of a pest? I think this tree is a purple leaf plum/plum cherry but I could be wrong.
The trees are on opposite sides of our garden and both bloomed in early spring. We love them but aren't knowledgeable gardeners so don't know where to begin with treating them! Any advice is welcome, thank you.