since 2002, on both residential and commercial citrus plants, citrus leaves with flat, circular, brownish lesions, with slightly raised and water-soaked margins, surrounded by a chlorotic halo have been observed by citrus canker inspectors with the Division of Plant Industry, Florida Department of Agriculture and consumer Services (DPI-FDAC) (21). The disease was observed only after storms that caused a high degree of damage and wounding to citrus trees. The flat lesions with slightly raised margins appeared somewhat similar to citrus canker (Xanthomonas citri pv.citri) and were therefore sent to the DPIFDAC laboratory for further analysis and identification. However, the lesion were different from those of citrus canker disease, and were confirmed negative for X.citri by polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Under the microscope a bacterial stream was consistenly observed from leaf tissue slices cut from these lesions, and gram-nagative bacteria producing whitish colonies were consistently isolate on nutrient agar plates.