Common Sweet Cherry - Leaf Spot
Leafspot
(fungus - Wflsonia hiemalis): This is the most common and most damaging
leaf disease of cherries. It is most prevalent during rainy springs. The reddish
spots drop out leaving circular holes in the leaves.(photo)
With severe infection, defoliation may follow the appearance of the "shot hole"
symptom. This disease can be controlled with foliar fungicides.