Seems like i have OFM based on my other post. What is the best treatment now that i have wilting tips and many of the other leaves have orange spots and are starting to turn yellow and fall off. I haven't seen that the orange spotted leaves are the result of OFM so there may be something else at work there.
These are 2 cherry trees. I see sap near the tip and at a couple of spots where the tree was pruned.

Should i cutt the wilted tips back a few inches? is there a systemic treatment? I don't have any fruit on the trees.