Citrus greening in Japan
A survey in Japan in 1988 confirmed the presence of citrus bacterium (EPPO Al quarantine pest) disease in the Ryukyu Islands. The vector Diaphorina citri (EPPO Al quarantine pest) was also widely distributed in the islands.
The authors stated that since only few commercial citrus orchards are present in the area the occurrence of the disease would not present a serious problem.
Sources
Miyakawa, T.; Tsuno, K. (1989) Occurrence of citrus greening disease in the southern islands of Japan.
Annals of the Phytopathological Society of Japan 55, 667-670.