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Raspberry > Leaves > Discolored leaves

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  • Image: Powdery Mildew 1

    Credit: M. Grabowski, U of MN Extension

  • Image: Powdery Mildew 2

    Credit: M. Grabowski, U of MN Extension

  • Image: Powdery Mildew 3

    Credit: M. Grabowski, U of MN Extension

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green arrowPowdery Mildew
Podosphaera aphanis

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  • Image: Virus 1

    Credit: SCRI-Dundee Archive, Scottish Crop Research Institute, Bugwood.org

  • Image: Virus 2

    Credit: Dept. of Horticulture, U of MN

  • Image: Virus 3

    Credit: Central Science Laboratory, Harpenden Archive, British Crown, Bugwood.org

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green arrowTomato Ringspot Virus and Mosaic Virus

  • Light to dark green mottling of leaves
  • Leaves may be deformed, blistered, or misshapen
  • Plants show a progressive stunting of growth and poor yield
  • Fruits on infected bushes are small and crumbly
  • General decline in the cane vigor and fruit production
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  • Image: Spider Mites 1

    Credit: Ohio State University

  • Image: Spider Mites 2

    Credit: M. Ellis, Ohio State University

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green arrowSpider Mites
Tetranychus urticae

  • Feeding on the underside of leaves causes a “russet” appearance to the leaves; leaves may become distorted
  • In heavy infestations, webbing can be found on underside of leaves
  • Adult spider mites are very small (approximately 1/50 inch in length), and are yellow to dark crimson, with dark spots
  • Mites usually appear in late June-August; more prevalent in hot, dry weather
  • More information on Spider Mites...
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  • Image: Nutrient Deficiency 1

    Credit: M. Grabowski, U of MN Extension

  • Image: Nutrient Deficiency 2

    Credit: M. Grabowski, U of MN Extension

  • Image: Nutrient Deficiency 3

    Credit: Dept. of Horticulture, U of MN

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green arrowNutrient Deficiency

  • Leaves turn yellow to white, often veins remain green
  • Canes show a general decline in vigor over time
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  • Image: Rust 1

    Credit: M. Grabowski, U of MN Extension

  • Image: Rust 2

    Credit: M. Grabowski, U of MN Extension

  • Image: Rust 3

    Credit: M. Grabowski, U of MN Extension

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green arrowYellow Rust and Orange Rust
Arthuriomyces peckianus and Phragmidium rubi-idaei

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  • Image: Herbicide Injury

    Credit: M. Pritts, Cornell Univ.

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green arrowHerbicide Injury

  • Leaves appear yellow or bleached
  • Distorted and twisted leaves, margins of the leaf are often cupped upward
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  • Image: Potato Leafhopper 1

    Credit: Marlin Rice, Iowa State University

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green arrowPotato Leafhopper
Empoasca fabae

  • Leaves appear wrinkled from leafhopper feeding; may have a yellow tinge to the leaves
  • Feeding may stunt the plant, resulting in a reduced yield
  • Potato leafhopper adults are lime green, slender, small (⅛ inch long), and wedge-shaped
  • Leafhoppers are present from June-August

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