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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Ribes > Curled, cupped or distorted leaves

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Ribes > Leaves > Curled, cupped or distorted leaves

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Plant Growth Regulator Herbicide Injury
(2,4-D, Dicamba, etc.)

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Powdery mildew
Phyllactina guttata

  • White, powdery spots or blotches on leaves
  • Leaves and stems may be completely covered with white, powdery fungal growth
  • Leaves may yellow and drop prematurely
  • Young leaves and shoots may be curled and twisted
  • Entire shrub may appear gray or discolored
  • More information on powdery mildew...

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