Common blight of beans

Symptoms initially appear on leaves as water soaked, often angular shaped spots and gradually grow to form large-brown spots of dead tissue, often surrounded by a very narrow zone of yellow tissue. Spots can form at the margins and interveinal regions. In severe infections, the plant appears burnt and dead leaves remain attached.

Spots on pods are generally circular, slightly sunken, water-soaked and dark green in colour. As spots age they turn dark red-brown in colour and under extremely humid conditions are covered with bacterial ooze.

Symptoms of common blight appear similar to halo blight, but halo blight has leaf spots with large, pale yellow margins.