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

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Catalpa > Leaves > Spots on leaves

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  • Image: Fire Blight 1
  • Image: Fire Blight 2
  • Image: Fire Blight 3

Leaf spot
Alternaria catalpae, Phyllosticta catalpae and others

  • Brown to black, round or irregular-shaped leaf spots
  • Leaves may appear ragged or shot holed from leaf spots that drop out
  • In severe infections, leaves may turn yellow and curl
  • More information on leaf spot
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  • Image: Obliquebanded Leafroller 1
  • Image: Obliquebanded Leafroller 2
  • Image: Obliquebanded Leafroller 3

Powdery mildew
Phyllactinia guttata

  • White to gray, felt-like spots or patches on leaves
  • Infected leaves may curl, twist or fold upwards
  • Infected blossoms are distorted, discolored and covered in white powdery fungal growth
  • Lower shaded leaves and small understory trees are most commonly affected
  • More information on Powdery mildew

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