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Dogwood > Stems/branches > Dead or dying branches

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  • Image: Plum Curculio 1
    Credit: M. Grabowski, University of Minnesota
  • Image: Plum Curculio 2

    Credit: M. Grabowski, University of Minnesota

  • Image: Plum Curculio 3

    Credit: M. Grabowski, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowGolden canker
Cryptodiaporthe corni

  • Only infects pagoda dogwood, Cornus alternafolia
  • Infected branches turn tan to orange and are covered with orange blister like spore producing structures
  • Infected branches often die during dormancy and fail to leaf out in the spring
  • More information on Golden Canker...
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  • Image: Codling moth 1
    Credit: Minnesota Department of Agriculture
  • Image: Codling moth 2

    Credit: James Solomon, USDA Forest Service. Bugwood.org

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green arrowDogwood borer
Synanthedon scitula

  • Holes and brown colored frass around pruning scars, injuries and burr knots
  • Crown dieback
  • Epicormic growth beneath infested area on tree
  • Particularly a pest of flowering dogwood
  • More information on Dogwood borer...
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  • Image: Plum Curculio 1
    Credit: M. Grabowski, University of Minnesota
  • Image: Plum Curculio 2

    Credit: M. Grabowski, University of Minnesota

  • Image: Plum Curculio 3

    Credit: M. Grabowski, University of Minnesota

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green arrowBotryosphaeria canker
Botryosphaeria dothidea

  • Leaves on one or more branches wilt, turn brown and die
  • Bark on affected branches is darker, cracked, or blistered at the site of the canker
  • Wood beneath the canker is dark brown
  • Common on shrubs stressed by drought, winter injury and other factors
  • More information on Botryosphaeria canker...
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  • Image: White Rot 1
    Credit: Jim Baker, North Carolina State University. Bugwood.org
  • Image: White Rot 2

    Credit: Jim Baker, North Carolina State University. Bugwood.org

  • Image: White Rot 3

    Credit: James Solomon, USDA Forest Service. Bugwood.org

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green arrowDogwood twig borer
Obera tripuncata

  • Larval tunnels inside branches, making holes in stems to push out frass and sawdust
  • Larvae feed downward, holes often occur near outside end of branches
  • Larval feeding cases leaves on random branches to wilt and turn brown
  • Adults chew on the underside of midrib of leaves causing the leaf to curl downward at tip
  • More information on Dogwood twig borer...

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