EPPO Platform
on PRAs

Express PRA for Candidatus Liberibacter solanacearum


The bacterium Candidatus Liberibacter solanacearum is endemic in Northern America and may cause massive damage on potatoes, tomatoes and pepper, as well as on carrots and celery. In Germany, Finland, France, Norway, Austria, Sweden and Spain it was found on carrots. Furthermore, it was detected on celery in Spain and in 2016 for the first time on potatoes. The bacterium is transmitted to potatoes by Bactericera cockerelli (Sulc) and perhaps by further psyllid species and apparently, also via planting material. So far, B. cockerelli does not occur in Germany. If the (infested) vector is introduced, a fast establishment and distribution of the pest have to be expected. The risk increases if also other psyllids (already occurring in Germany/the EU) could serve as a vector. Apparently, also the psyllids Trioza apicalis Förster and B. trigonica Hodkinson that occur in the EU transmit the bacterium. At present, it is assumed that there is only a transmission to carrots but because of the infestation of potatoes in Spain, a transmission to potatoes cannot be excluded. So far, the pest is not listed in the Annexes of the Directive 2000/29/EC; nevertheless, it is included in the EPPO A 1 list, together with the vector Bactericera cockerelli. A risk assessment of the EPPO is available. Due to the high damage potential, Ca. L. solanacearum presents a significant phytosanitary risk for Germany and other


  • 'Candidatus Liberibacter solanacearum'


  • Apium graveolens
  • Capsicum sp.
  • Daucus carota
  • Lycium barbarum
  • Lycium chinense
  • Physalis alkekengi
  • Physalis peruviana
  • Solanum carolinense
  • Solanum dulcamara
  • Solanum lycopersicum
  • Solanum melongena
  • Solanum nigrum
  • Solanum physalifolium
  • Solanum physalifolium var. nitidibaccatum
  • Solanum sarrachoides
  • Solanum triflorum
  • Solanum tuberosum
  • Solanum villosum


Type File Size
Pest Risk Analysis Download 153,96kB

PRA Area

  • Germany