Esca (Measles)
These symptoms are diagnostic of Esca (Measles):
- Leaf symptoms (Figure 7)
- Fruit spots (Figure 8)

Figure 8 – Fruit spots are visible on white cultivars of wine grapes (e.g., Sauvignon blanc, shown here) and table grapes (e.g., Thompson seedless). (Photo by Monica Cooper).
- Concentric rings of black spots (Figure 9)
Figure 9 – Concentric rings of black spots surround the pith, which is the naturally darkened core of this cordon. (Photo by Rhonda Smith).
Main Esca Pathogens: Phaeomoniella chlamydospora
Phaeoacremonium aleophilum (teleomorph Togninia minima)
Other Phaeoacremonium species
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