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

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Potentilla > Leaves > Spots or blotches on leaves

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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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Phragmidium spp.

  • Bright orange raised spots on underside of leaves
  • Abundant powdery orange spores may be present
  • Leaves turn yellow, curl and drop
  • More information on rust
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Downy mildew
Peronospora potentillae

  • Light green angular spots appear on upper leaf surfaces and shoots; later turn coppery or brown
  • White or gray tufts appear on underside of leaves; may be dense in humid weather
  • Infected shoots may lose leaves and die
  • More information on Downy mildews in trees and shrubs

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