Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Snap bean > Spots or blotches on pod
Snap bean > Pod > Spots or blotches on pod
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Halo Blight
Pseudomonas syringae pv. Phaseolicola
- Pods have small water-soaked spots
- 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
- More information on managing diseases in the home vegetable garden
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Common Blight
Xanthomonas campestris
- Pods have water-soaked areas that later turn brown
- Leaves develop water soaked spots more easily seen on underside of leaves
- Leaf spots turn brown, sometimes with a yellow halo
- More information on managing diseases in the home vegetable garden
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Bacterial Brown Spot
Pseudomonas syringae pv. Syringae
- Pod may appear twisted or bent
- 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
- More information on managing diseases in the home vegetable garden
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Bean Rust
Uromyces appendiculatus
- Pods and stems develop reddish-brown raised pustules
- Leaves develop reddish-brown, raised pustules surrounded by a yellow halo
- Powdery brown spores can be seen when spots are rubbed with a white tissue
- Severe infections cause leaves to brown, dry, and drop from the plant
- More information on managing diseases in the home garden
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Anthracnose
Colletotrichum lindemuthianum
- Dark brown to black, sunken oval spots on pods
- Seedling stem has black lesions
- Black, sunken streaks or ovals on petioles and stems
- Random dark brown to black lines develop along leaf veins
- More information on managing diseases in the home garden
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Viruses
Bean Common Mosaic Virus, Bean Yellow Mosaic Virus and others
- Pods can be distorted, blotchy with dark and light green, and in severe cases, have bronze blotchy areas
- Plants are stunted
- Leaves are curled, mottled, and may be yellow
- More information on Viruses
- Plant resistant varieties
- Control weeds in and around the field
