The isolations from all the symptomatic plants yielded the occurrence of many fluorescent colonies on KB. Represen tativeisolates were streaked in purity for subsequent identification.All isolates were positive for levan production as well as forhy persensitivity response on tobacco leaves, and negative for the presence of oxidase and arginine dihydrolase and for potato rot-ting (LOPAT group IA). In addition, they hydrolysed aesculin andarbutin, liquefied gelatin, utilized in ositol, quinate and sorbitol butnot anthranilate, homoserine or L(+)-tartrate, and did not producetyrosinase. Furthermore, all the isolates induced necrotic lesion on lemon fruits and were positive for the detection of the syrB gene,coding for syringomycin phytotoxin production. All isolates were identified as P. syringae pv. syringae.