Bacterial brown spot is caused by the bacterium Pseudomonas syringae pv. syringae (Figures 4 and 5). In addition to attacking lima, green or snap, and wax beans, the bacterium infects a wide range of host plants. These hosts include civet, hyacinth, yard-long, and broad beans, soybeans, cowpea, clovers, alfalfa, corn, sorghums, Sudangrass, buckwheat, kudzu, lilac, ash, poplar, Forsythia, wild and cultivate stone fruits (Prunus spp.), apple, pear, Citrus species, rose, flowering stock, hibiscus, jasmine, Florida velvetbean, and many others. Fortunately only bean isolates are highly virulent on beans.