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Serviceberry >Trunk/branches > Discolored or cracked area bark

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  • Image: Apple Scab 1
    Credit: G. Sundin, Michigan State University
  • Image: Apple Scab 2

    Credit: G. Sundin, Michigan State University

  • Image: Apple Scab 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: Apple Maggot 1
    Credit: James Solomon, USDA Forest Service, Bugwood.org
  • Image: Apple Maggot 2

    Credit: Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, Bugwood.org

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green arrowRoundheaded appletree borer
Saperda candida

  • Dead stems and stem breakage
  • Cracks or splits in bark on lower stems
  • Areas of darkened bark and sap oozing from entrance hole
  • Larvae have round bodies, tan to cream colored, legless, about 1 – 1 ½" long
  • Adult brown with two white stripes, about ¾" long with equally long antennae
  • More information on Roundheaded appletree borer...
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  • Image: Plum Curculio 1
    Credit: M. Grabowski, University of Minnesota
  • Image: Plum Curculio 2

    Credit: Gerhard Koller

  • Image: Plum Curculio 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 ¼ 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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