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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Ironwood (Ostrya) > Spots on leaves

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Ironwood (Ostrya) > Leaves > Spots on leaves

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  • Image: Winter Injury 1
  • Image: Winter Injury 2
  • Image: 3

Anthracnose
Apiosporopsis carpinea

  • Leaves have reddish brown irregular spots or blotches
  • Leaves may drop prematurely
  • Reddish brown cankers on branches; may become sunken and surrounded by ridges of wound wood with age
  • Dead twigs and wilted, bleached leaves on branches with girdling cankers
  • More information on Anthracnose...
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  • Image: Black Rot 1
  • Image: Black Rot 2
  • Image: Black Rot 3

Powdery mildew
Erysiphe ellissi and Phyllactinia guttata

  • White-gray, felt-like spots or patches on leaves
  • Infected leaves may curl, twist or fold upwards
  • Lower shaded leaves and small understory trees are most commonly affected
  • More information on Powdery mildew...

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