Erwinia decline of papaya (D strains) and the Erwinia mushy canker disease of papaya (MC strains), in Hawaii [11]. Webb [12] reported a species of Erwinia that caused angular water-soaked lesions on leaves and firm water-soaked cankers on the stems of papaya. Recently, the causal agent of bacterial canker in papaya was identified as a new bacterium species named E. papayae [5]. In this 1μm study, we report for the first time E. mallotivora as a new pathogen of papaya.