Sometimes the center of the spot falls out leaving a hole in the leaf. Photo by Margery Daughtrey. Blotches Blotches are bigger than spots and usually develop at the end of the leaf. Photo by Margery Daughtrey. Blight Blight covers the entire leaf and can then progress into the stem to cause new limb infection and cankers.
Cankers are places where the bark and wood have died.
Photo by Craig Hibben.