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Septoria
leaf spot - Septoria ampelina
Annemiek
Schilder, MSU Plant Pathology |
| Home > Scouting guide> septoria leaf spot |
| Septoria leaf spot,
also called mélanose, is a minor foliage disease in the eastern and
midwestern United States. The disease mainly affects American Vitis and
muscadine grapes. Angular, reddish brown to black spots that are 1 to 2
mm in diameter appear after midseason. Nearing veraison, lesions become
larger with diffuse margins. Fruiting bodies may be seen with a hand lens.
The area surrounding the spots may be yellow. The fungus overwinters in
infected leaf debris. |
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