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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Potentilla > Leaves or shoots curled or stunted

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Potentilla > Leaves > Leaves or shoots curled or stunted

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Non-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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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 mildew...
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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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