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Blueberry > Stems/branches > Spots or blotches on stems or branches

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  • Image: Iron Chlorosis
    Credit: Department of Horticulture, Oregon State University
  • Image: 2

    Credit: Marvin Pritts and Cathy Heidenreich, Cornell University

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green arrowFusicoccum Canker
Fusicoccum putrefaciens

  • Reddish brown, target like cankers can be found on infected branches
  • Cankers are often low on the branch and near a leaf scar
  • Cankers enlarge each year until they girdle and kill the stem
  • In summer, leaves on infected branches, wilt and turn reddish brown
  • Small black bumps can be found around cankers and on dead branches
  • More information on Fusicoccum Canker...
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  • Image: Iron Chlorosis
    Credit: Annemiek Schilder, Michigan State University
  • Image: 2

    Credit: Bruce A. Watt, University of Maine

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green arrowAnthracnose

  • Salmon to orange colored sticky spore masses develop on infected berries and stems when wet
  • Infected twigs/canes have dark brown lesions with raised bumps arranged in concentric circles
  • Reddish-brown round to irregular spots on leaves
  • Berries become soft and wrinkled from the blossom end
  • More information on Anthracnose...
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  • Image: Powdery Mildew 1
    Credit: Marvin Pritts and Cathy Heidenreich, Cornell University
  • Image: Powdery Mildew 2

    Credit: Washington State University

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green arrowBotrytis Blight/Gray Mold
Botrytis cinerea

  • Twigs turn brownish-black and become gray
  • Infected blossoms turn brown and become covered with a fuzzy gray mold
  • Berries are covered with a fuzzy gray mold
  • Leaves have brown, irregular lesions and may become distorted
  • More information on Botrytis Blight/Gray Mold...

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