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Serviceberry > Leaves > Leaves discolored and wilted

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  • Image: Black Rot 1
    Credit: G. Sundin, Michigan State University
  • Image: Black Rot 2

    Credit: G. Sundin, Michigan State University

  • Image: Black Rot 3

    Credit: University of Georgia Plant Pathology Archive, University of Georgia, Bugwood.org

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green arrowFireblight
Erwinia amylovora

  • Infected leaves wilt, turn gray then dark brown to black
  • Young shoots wilt into a shepherd's crook
  • Infected blossoms first turn gray, then black
  • Infected leaves and mummified fruit remain attached to the tree, often into winter
  • Branch cankers have dark, sunken & cracked bark, sapwood is streaked reddish brown
  • Drops of sticky honey-colored liquid can be seen on infected plant parts in warm wet weather
  • More information on Fireblight...
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  • Image: White Rot 1
    Credit: L. S. Gill, USDA Forest Service, Bugwood.org
  • Image: White Rot 2

    Credit: Larry Grand, North Carolina State University

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green arrowJuniper broom rust
Gymnosporangium nidus-avis

  • Leaf spots start as small yellow to orange spots with a red border and grow into large brown blotches with red margins
  • Swollen yellow spots on leaf veins, petioles and green twigs
  • Young shoots and leaves can turn completely brown due to a girdling infection on twig or petiole
  • White tube-shaped spore producing structures form on infected twigs, petioles and the lower surface of leaf spots in July
  • More information on Juniper broom rust...
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  • Image: Fire Blight 1
    Credit: Helen Atthowe, Missoula County Extension
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green arrowBlack witches' broom
Apiosporina collinsii

  • Witches' brooms, clusters of numerous weak shoots arising from one point on a branch, occur randomly throughout the tree
  • Dark, olive colored spots of fungal fruiting bodies on underside of leaves
  • Leaves within witches' brooms are first yellow and stunted, turn black
  • Common in wooded, shaded and moist areas
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  • Image: White Rot 1
    Credit: M. Grabowski, University of Minnesota
  • Image: White Rot 2

    Credit: M. Grabowski, University of Minnesota

  • Image: White Rot 3

    Credit: M. Grabowski, University of Minnesota

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green arrowBlister canker
Biscogniauxia marginata

  • Dead branches in the canopy
  • Elongate, darkened canker on trunk or branch often centered on a crack or wound
  • Reddish brown discoloration of sapwood extending up and down from crack or wound
  • Round flat gray to black fungal spore producing structures up to ΒΌ inch across, push through bark on infected branches
  • Bark often peels back in rolls on infected branches
  • Most common on drought stressed, wounded trees
  • More information on Blister canker...

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