Citrus canker is a contagious disease of citrus caused by the bacteria Xanthomonas citri subsp. citri. Infected trees display unsightly lesions which can form on leaves, fruit and stems.
Many citrus crops can be affected by citrus canker, including:
Citrus canker can be spread rapidly over short distances, particularly in tropical and subtropical climates by wind-blown rain. Overhead irrigation systems can also spread the disease. Long distance spread occurs through flooding, cyclones, or by people moving infected plant material or equipment.
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