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Thirteen leaf samples were collected on citrus trees showing Huanglongbing (HLB) (Greening) or HLB-like symptoms in Reunion Island in December 1993 and analyzed by DNA-DNA hybridization with probes In 2.6 and AS 1.7 specific for Liberobacter asiaticum and L. africanum, respectively. Nine samples reacted with AS 1.7 only, 1 with In 2.6 only, 2 with both AS 1.7 and In 2.6; 1 was negative with both probes. Thirty-eight samples were also collected in Mauritius on trees showing HLB or HLB-like symptoms in December 1993 and analyzed as above.Sixteen were found infected with L. africanum, six with L. asiaticum, and two with both libero-