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Ironwood (Ostrya) > Trunk/branches > Unusually colored area of bark on trunk or branches

1 of 2
  • Image: Fire Blight 1
    Credit: M. Grabowski, University of Minnesota
  • Image: Fire Blight 2

    Credit: M. Grabowski, University of Minnesota

  • Image: Fire Blight 3

    Credit: J. O'Brien, USDA Forest Service, Bugwood.org

  • - CLICK PHOTOS TO ENLARGE -

green arrowSmooth patch
Aleurodiscus oakesii

  • Sunken, relatively smooth, round to irregular areas of bark on trunk or branches
  • Affected bark is often lighter in color
  • Small cream colored disks or saucer-like fungal spore producing structures grow within affected area
  • Has no effect on the overall health of the tree
  • More information on Smooth patch...
2 of 2
  • Image: Fire Blight 1
    Credit: Robert L. Anderson, USDA Forest Service, Bugwood.org
  • Image: Fire Blight 2

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

  • Image: Fire Blight 3

    Credit: Mn Department of Natural Resources Archive, Mn DNR, 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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