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Ironwood (Ostrya) > Leaves > Spots on leaves

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  • Image: Winter Injury 1
    Credit: Mn Department of Natural Resources Archive, Mn DNR, Bugwood.org
  • Image: Winter Injury 2

    Credit:Robert L. Anderson, USDA Forest Service, Bugwood.org

  • Image: 3

    Credit: Robert L. Anderson, USDA Forest Service, Bugwood.org

  • - CLICK PHOTOS TO ENLARGE -

green arrowAnthracnose
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
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  • Image: Black Rot 1
    Credit: Petr Kapitola, State Phytosanitary Administration, Bugwood.org
  • Image: Black Rot 2

    Credit: Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org

  • Image: Black Rot 3

    Credit: Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org

  • - CLICK PHOTOS TO ENLARGE -

green arrowPowdery 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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