Citrus canker disease was detected for the first time in Solomon Islands on Guadalcanal Island. The bacterium was isolated from diseased citrus plants exhibiting distinct citrus canker symptoms consisting of crater-like lesions on the rind
of fruit and corky yellow-brownish lesions on leaves.Xanthomonas citri subsp. citri was identified using biochemical and molecular tests and confirmed as the causal agent by fulfilling Koch’s postulates.