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

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Snap bean > Leaves > Spots on leaves

1 of 4
  • Bacterial Brown Spot 1
  • Bacterial Brown Spot 2
  • Bacterial Brown Spot 3

Bacterial Brown Spot
Pseudomonas syringae pv. Syringae

  • Leaves develop small water-soaked spots that turn brown with a yellow margin
  • Leaf spots may fall out giving leaves a "tattered" appearance
  • Sunken brown spots can form on the pods
  • Pod may appear twisted or bent
  • More information on Bacterial Brown Spot...
2 of 4
  • Common Blight 1
  • Common Blight 2
  • Common Blight 3

Common Blight
Xanthomonas campestris

  • Leaves develop water soaked spots more easily seen on underside of leaves
  • Leaf spots turn brown, sometimes with a yellow halo
  • Pods have water-soaked areas that later turn brown
  • More information on Common Blight...
3 of 4
  • Halo Blight 1
  • Halo Blight 2
  • Halo Blight 3

Halo Blight
Pseudomonas syringae pv. Phaseolicola

  • Underside of leaves have small water-soaked spots, eventually developing into reddish-brown lesions
  • Leaf lesions may be surrounded by an irregular greenish-yellow halo
  • Pods have small water-soaked spots
  • More information on Halo Blight...
4 of 4
  • Viruses 1
  • Viruses 2
  • Viruses 3

Viruses
Bean Common Mosaic Virus, Bean Yellow Mosaic Virus and others

  • Leaves are curled, mottled, and may be yellow
  • Plants are stunted
  • Pods can be distorted, blotchy with dark and light green, and in severe cases, have bronze blotchy areas
  • More information on Viruses ...

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