ABSTRACT
The major production constraints of beans include moisture stress, diseases, insect pest, weeds, poor soil fertility, and lack of improved seeds. The disease can be spread by wind-driven rain, overhead irrigation, equipment, or people and animals. Severe outbreaks of halo blight often occur after heavy rainstorms. The bacteria that cause common bacterial blight, halo blight, bacterial brown spot and bacterial wilt survive from season to season in infected seed and infested bean residue. Overhead irrigation increases the risk of disease by providing the moisture and splashing water necessary for bacterial spread and disease development. So irrigation management by avoiding overhead irrigation is very important. The disease is spread through wind-blown spore. Initially, lesions appear as grey or brown irregular spots having a chlorotic halo in the leaves. Later, these lesions turn brown and necrotic and appear as an angular shape, which is a characteristic of this disease.
