Bacterial blight of pea first becomes evident as small, dark green, water-soaked lesions on leaves and stipules. The lesions on the leaflets turn yellowish and later brown and papery, lesions on the pods are sunken and turn olive-brown. Lesions may also develop on stems near ground level. These begin as water-soaked areas, which later turn olive-green to dark brown. Stem lesions may coalesce, causing the stem to shrivel and die. Stem infection may spread upwards to the stipules and leaflets. Pre-emergence and post-emergence damping-off may occur, and even advanced plants may be killed. Heavily infected seed may be discoloured, but light infection has no visible effect on seed.