Bacterial Spot of Cowpea and Lima Bean ^s

The bacterial spot disease of cowpeas was first noted in southern Indiana in 1919, out its bacterial nature was not determined until 1921, when it occurred in an experimental plot of cowpeas at La Fayette, Ind. It is a typical spot disease of the leaves, stems, and pods, distinctly different from the other bacterial diseases of cowpeas reported in the literature. The organism which causes this disease also causes a very similar and widespread spot disease of lima beans which has been described recently by Tisdale and Williamson (28,21^) . The work herein reported deals mainly with the symptoms of the disease as it occurs on cowpeas, the isolation, characteristics, overwintering, pathogenicity, and dissemination of the causative bacteria, and the identity of the latter with the species causing the lima-bean disease. HISTORY AND OCCURRENCE