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Winterberry > Leaves > Leaves discolored white, yellow, or pale green

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  • Image: 1
    Credit: Forest Health Management International, Bugwood.org
  • Image: 2

    Credit: John Hartman, University of Kentucky, Bugwood.org

  • Image: 2

    Credit: John Ruter, University of Georgia, Bugwood.org

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green arrowIron chlorosis

  • Leaves are yellow with prominent green veins
  • Most evident on new growth
  • May be sporadic throughout the plant
  • In severe cases, new growth becomes white, stunted and dies
  • Most common in alkaline soils or heavy clay soils
  • More information on iron chlorosis...
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  • Image: 1
    Credit: Whitney Cranshaw, Colorado State University, Bugwood.org
  • Image: 2

    Credit: Frank Pearis, Colorado State University, Bugwood.org

  • Image: 2

    Credit: Jeffrey Hahn, University of Minnesota

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green arrowTwo-spotted spider mite
Tetranychus urticae

  • White to yellow stippling on foliage; leaves can be off-green
  • Heavy infestations will cause leaves to turn white, yellow and ultimately grayish bronze; premature leaf drop may occur
  • Webbing may be present, especially when heavily infested
  • Mites usually appear in late June to August; they are more prevalent in hot, dry weather
  • Adult spider mites are small(approximately 1/50 inch long) and are hard to see; they are yellow to dark red with dark spots (need magnification to see)
  • More information on two-spotted spider mite...
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  • Image: 1
    Credit: John Hartman, University of Kentucky, Bugwood.org
  • Image: 2

    Credit: Whitney Cranshaw, Colorado State University, Bugwood.org

  • Image: 2

    Credit: Whitney Cranshaw, Colorado State University, Bugwood.org

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green arrowPowdery mildew
Erisyphe polygoni

  • White spots or blotches on leaves
  • In severe cases leaves and young shoots may be completely covered with white powdery fungal growth
  • Leaves may be stunted, curled or puckered
  • Red or purple blotches may occur on upper leaf surfaces
  • More information on powdery mildew...
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  • Image: 1
    Credit: Chazz Hesselein, Bugwood.org
  • Image: 2

    Credit: M. Grabowski, University of Minnesota

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green arrowNon-selective herbicide injury
(Round-up, Kleen-up, and other glyphosate products)

  • Yellowing, wilting, browning leaves and eventual death of foliage and plants
  • Damage usually appears first in new tissues
  • Shrubs sprayed during the summer or fall may not have noticeable injury until the following season when leaves appear as stunted, narrow, strap-like, and chlorotic

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