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

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Peas > Leaves > Spots on leaves

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  • Image: Early Blight 1
  • Image: Early Blight 2
  • Image: Early Blight 3

Aschochyta Leaf and Pod Blight
Aschochyta pisi

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  • Image: Early Blight 1
  • Image: Early Blight 2
  • Image: Early Blight 3

Mycosphaerella Blight
Mycosphaerella pinodes and Phoma medicaginis var. pinodella

  • Seedling stem turn dark brown to black, often near the soil line, seedlings may be killed or grow weakly
  • Small dark flecks on stems, leaves and pods
  • Leaf spots grow into round brown spots with several concentric rings like a bull's eye
  • Purplish black lesions on stems
  • More information on Mycosphaerella Blight...
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  • Image: Blossom End Rot 1
  • Image: Blossom End Rot 2

Bacterial Blight
Pseudomonas syringae pv. Pisi

  • Leaf spots are first shiny dark green and water-soaked
  • Older leaf spots are angular, papery brown, and may appear translucent
  • Greasy green to gray spots or blotches develop on pods
  • A sticky slime of bacterial ooze may form on leaf spots or surround the pea seeds when wet
  • Severely infected plants may drop blossoms or young pods, turn brown, or die
  • Disease is most severe when frequent rain or sprinkler irrigation are present
  • More information on Bacterial Blight...
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  • Image: Flea Beetles 1
  • Image: Flea Beetles 2

Powdery mildew
Erysiphe pisi

  • Powdery white fungal growth forms spots on or completely coats leaves, stems and pods
  • Small round orange to black fungal structures develop in white mats
  • Pea seeds may be dull, gray brown and have a bitter taste
  • Plants may be stunted
  • Most common on late planted or late maturing plants

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