Allora's Advice

Citrus Canker

Tiffany Cornell . Monday, April 30, 2018 . Comments
Citrus Canker 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.
Trees infected with the disease may suffer from low vigour and a reduction in fruit quality and quantity. Citrus canker is a serious disease impacting on citrus production and is the subject of a number of control and eradication programs around the world.
Citrus canker can cause abnormal leaf fall, die back, discolouration, poor growth and economic loss. In severe cases infected trees will die.

Many citrus crops can be affected by citrus canker, including:

  • limes
  • lemon
  • citron
  • mandarin
  • orange
  • grapefruit.

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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