Leaf spot of Plums

Leaf spot of plums and prune-type plums is caused by the fungus Coccomyces prunophorae. The fungus, its life cycle, and the disease it causes are very similar to those of cherry leaf spot. On plum leaves, the spots tend to be smaller, and severely infected leaves often have a tattered appearance. Unlike cherry infection, severe plum leaf infection is often followed by a heavy fruit drop.