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Raspberry > Fruit > Discolored or rotten berries

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  • Image: Botrytis 1

    Credit: M. Grabowski, U of MN Extension

  • Image: Botrytis 2

    Credit: M. Grabowski, U of MN Extension

  • Image: Botrytis 3

    Credit: M. Grabowski, U of MN Extension

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green arrowBotrytis
Botrytis cinerea

  • Infected fruit may remain attached as shriveled, dried, black “mummies”
  • Flowers are brown to black and dry out
  • Gray powdery spores cover part or all of the infected fruit under moist conditions
  • Disease favored by wet conditions and temperatures between 41-86° F
  • Light brown oval lesions form on canes where the leaves attach, and faded brown concentric circles are often visible within the lesion
  • More information on Botrytis...
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  • Image: Botrytis 1

    Credit: Jeff Hahn, University of Minnesota

  • Image: Botrytis 2

    Credit: Eric Burkness, University of Minnesota

  • Image: Botrytis 3

    Credit: Eric Burkness, University of Minnesota

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green arrowSpotted Winged Drosophila
Drosophila Suzukii

  • Active in gardens from July to September
  • Larvae feed on healthy, intact, ripening fruits
  • Larvae feed within the berries causing brown, sunken areas
  • Fruit becomes soft and decays
  • Adult flies are small (1/8 - 1/12 inch) long, yellowish-brown and red eyes, larvae are small (1/8” long), white and cylindrical
  • More information on Spotted Winged Drosophila
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  • Image: Suncald

    Credit: Dept. of Horticulture, U of MN

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green arrowSunscald

  • Individual raspberry drupelets are white
  • More common in dry conditions

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