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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Barberry > Leaves discolored

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Barberry > Leaves > Leaves discolored

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  • Image: Plum Curculio 1
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Powdery Mildew
Erysiphe pulchra and Phyllactina guttata

  • White spots or blotches on leaves
  • In severe cases leaves may be completely coated with white powdery fungal growth
  • Leaves may be stunted, reddened, scorched and curled or puckered by midseason
  • More common on yellow leaved species
  • More information on Powdery Mildew ...
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  • Image: Plum Curculio 1
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Verticillium wilt
Verticillium dahliae

  • Leaves on one to several branches turn red to yellow, wilt, die and fall off
  • Dark olive to gray streaks are often visible in the sapwood if the bark is peeled back
  • Symptoms may appear in several branches or in the entire shrub
  • Symptoms are often most obvious in late summer and autumn but can occur throughout the growing season
  • More information on Verticillium wilt ...
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  • Image: Eastern Tent Caterpillar 1
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Botryosphaeria canker
Botryosphaeria dothidea

  • Leaves on one or more branches wilt, turn brown and die
  • Bark on affected branches is darker, cracked, or blistered at the site of the canker
  • Wood beneath the canker is dark brown
  • Common on shrubs stressed by drought, winter injury and other factors
  • More information on Botryosphaeria canker...
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  • Image: Plum Curculio 1
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Pear sawfly (pearslug)
Caliroa cerasi

  • Larvae feed on upper surface of leaf between the veins, "windowpaning" the leaf as they feed
  • Damaged leaves often have a grayish appearance before turning brown
  • Leaves may drop prematurely
  • Larvae normally feed about 4 weeks beginning in June; a second generation can start in August
  • Larvae are ½ inch long, shiny, slug-like, and are normally dark olive in color.
  • More information on Pear sawfly ...

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