Potato Review Group

Contents

Background

Control

Further information:

Notes on zebra chip

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Background

  1. The causal organism is now known as Candidatus Liberibacter solanacearum (Ca. L. solanacearum).
  2. This is a phloem-limited bacterium like organism.
  3. The bacterium is transmitted to potatoes by the potato-tomato psyllid, Bactericera cockerelli.
  4. This psyllid generally occurs in warm conditions and has not yet been found in Europe.
  5. However, Ca. L. solanacearum infection of carrots in Europe had been associated with other species of psyllids.
  6. Symptoms in potato foliage include rolling of leaves but the main problem occurs in tubers, which show dark stripes.
  7. Tuber symptoms are particularly evident after frying and result in crop rejections for processing.

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Control

  1. In countries where zebra chip occurs, control is by use of uninfected seed and by control of the psyllids.
  2. A post-entry quarantine test was introduced for Ca L solanacearum in the UK in 2010.

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Further information

Notes on zebra chip

Zebra chip disease 2012 (Biology, transmission and risk)

 

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