My shrubs which I do not know how it called, had been loss leave, and dry out entire branches. It begin with some copper spot on leaf and then dry it out. I started with Thiomyl once every 7 days, and I had done it for three weeks (this products I used it two years ago, in my Indian Hawthorn shrubs whit something like this). These trees I had not seen any improvement. I attached pictures. I really appreciated any advice on the issue.

Thank you.