Table 1.

Characteristics of the pathogenic bacteria isolated from citrus canker.

Characteristics	The bacteria isolated from citrus canker on lime	Xanthomonas citri subsp. citri*
Gram staining	Negative	Negative
Cell shape	Rod	Rod
Cell size (μm)	2.0–2.5 × 0.5–0.75	1.5–2.0 × 0.5–0.75
Catalase	+	+
Oxidase	−	− or weak
Nitrate reduction	−	−
Urease	−	−
Gelatin liquefaction	+	+
Starch hydrolysis	+	+
Casein hydrolysis	+	+

^*(Schaad et al. 2001; EPPO 2005; ISPM 2014)