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Angular, yellow to light brown lesions or spots on leaves enlarge to produce irregular areas of dead tissue surrounded by yellow halos. With wind and rain these large dead areas drop out or tear away, giving the leaves a ragged appearance. Lesions may develop on the pods, and infected seed may be covered with a slimy bacterial growth. The disease is common during cool, wet weather, and symptoms typically occur several days after a rain with driving winds or a hailstorm. The pathogen survives in crop debris and on seed. Crop rotation, planting disease-free seed and avoiding the use of equipment in a field when foliage is wet may help reduce bacterial blight. |
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