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Figure 1. Cherry Leaf Spot Disease Cycle (Ellis).
Figure 1 Explained
Figure 1 Explained
Airborne ascospores infect leaf on tree.
The leaf becomes infected (See Infection Process below).
Infected leaves turn yellow and spotty and eventually fall off the tree.
The leaves stay on the ground through the winter.
Spring rains cause the ascospores in the leaves to become airborne.
Infection Process
Infection Process
The ascospores stick to the bottom of a leaf.
The ascospores germinate in a film of water.
At the right temperature, the ascospores penetrate the leaf through its pores.
Small purple-ish spots start to appear on the top side of the leaf.
More spots will begin to form on the leaf.
During times of rain, the infection will spread by splashing onto other leaves.
Station Disease Report (2020)
Station Disease Report (2020)
Figure 2. Report shows the presence of Cherry Leaf Spot noting the date, temperature, and rainfall (East).
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