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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Ninebark > Spots or blotches on leaves

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Ninebark > Leaves > Spots or blotches on leaves

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Powdery 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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Calligrapha beetle
Calligrapha spireaeae

  • Holes and chewed areas are found in leaves; feeding may be heavy
  • May be browning and drying of leaves
  • Adults are present in July and August
  • Adults are yellowish to reddish brown with ornate black and gold markings
  • More information on calligrapha beetle

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