Though caused by different species of bacteria, each produces similar symptoms on bean plants. The initial symptom of bacterial blight infection appears as water-soaked spots on the lower leaf surface.
Lesions usually turn brown with time and often are surrounded by a narrow yellow halo.
As the lesions enlarge they often run together resulting in extensive brown dead areas. When severe, leaves often appear burned. In time, leaves become ragged and may drop prematurely. Symptoms on pods appear as circular, sunken, reddish-brown lesions that vary in size. Pod lesions are usually surrounded by a dark reddish-brown margin.