1990 Volume 56 Issue 4 Pages 474-480
A bacterial disease of mango (variety: Irwin) characterized by dark brown raised lesions on leaves and fruits occurred in Hirara City, Miyako Island, Okinawa Prefecture, in July 1985. Colonies of the isolated bacteria from the affected leaves and bacterial ooze from the mature raised lesions were not yellow but white to creamy white in colour on PSA (Wakimoto medium). These isolates developed the same symptoms on mango leaves as the original ones in inoculation tests. About 70 bacterial characteristics of the isolates were identical with those of Xanthomonas campestris. From these results, the causal bacterium was identified as Xanthomonas campestris pv. mangiferaeindicae (Patel, Moniz & Kulkarni 1948) Robbs, Ribeiro & Kimura 1974. It was suggested that the disease should be the bacterial canker of mango founded on the symptoms on leaves and fruits. The Japanese name of the disease was designated as “Kaiyo-byo.” This is the first occurrence of the disease in Japan.
