Pest categorisation of Citrus tristeza virus (non‐European isolates)

Vittorio Rossi, Michael Jeger, Claude Bragard, David Caffier, Katharina Dehnen‐Schmutz, Gianni Gilioli, Jean‐Claude Gregoire, Josep Anton Jaques Miret, Alan MacLeod, Maria Navajas Navarro, Björn Niere, Stephen Parnell, Roel Potting, Trond Rafoss, Gregor Urek, Ariena Van Bruggen, Wopke Van der Werf, Jonathan West, Elisavet Chatzivassiliou, Stephan WinterAntonino Catara, Nuria Duran‐Vila, Gabor Hollo, Thierry Candresse

Risultato della ricerca: Contributo in rivistaArticolo in rivista

Abstract

The Panelon Plant Health performed a pest categorisation of non-European isolates of Citrus tristeza virus (CTV) for the EU territory. CTV is a well characterised virus for which efficient detection assays are available. It is transmitted by vegetative multiplication of infected hosts and by aphid vectors. The most efficient one, Toxoptera citricida, has limited EU presence but another one, Aphis gossypii, is broadly distributed. CTV is reported from a range of countries outside the EU and EU isolates are present in seven of the eight citrus-growing member states. Non-EU isolates are not known to occur in the EU and therefore do not meet one of the criteria for being a Union regulated non-quarantine pest. The natural host range of CTV is restricted to Citrus, Fortunella and Poncirus species. CTV non-EU isolates are listed in Annex IIAI of Directive 2000/29/EC and the main pathway for entry, plants for planting, is closed by the existing legislation. CTV isolates may therefore only enter through minor alternative pathways. They have the potential to subsequently spread through plants for planting and through the action of aphid vectors. CTV non-EU isolates are able to cause severe symptoms on a range of citrus crops that EU isolates do not induce. Overall, non-EU CTV isolates meetall the criteria evaluated by EFSA to qualify as Union quarantine pests. The main knowledge gaps and uncertainties concern (1) the status of Rutaceae species other than Citrus, Fortunella and Poncirus as natural hosts for CTV; (2) the potential undetected presence of non-EU CTV isolates in the EU and in particular the prevalence and biological properties of CTV isolates that may be present in ornamental citrus; and (3) the inability of EU CTV isolates apparently related to non-European stem pitting (SP) isolates to cause SP in sweet orange.
Lingua originaleEnglish
pagine (da-a)1-29
Numero di pagine29
RivistaTHE EFSA JOURNAL
Volume15
DOI
Stato di pubblicazionePubblicato - 2017

Keywords

  • Aphis gossypii
  • Citrus
  • Citrus tristeza virus (no-EU)
  • Fortunella
  • Poncirus
  • Toxoptera citricida
  • stem pitting

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