Diagnosis
Diagnose: Cherry Blossom Leaf Spot
Use these observations to decide what to check next.
Read the tissue around each hole before naming the cause
Look for intact young lesions as well as old holes.
Purple round spots with yellowing and whitish patches beneath support fungal cherry leaf spot, angular dark spots with twig gum support bacterial spot and canker, while clean irregular bites, fine stippling, or a white surface coating point elsewhere.