Evaluation of a paper by Guarnaccia et al. (2017) on the first report of Phyllosticta citricarpa in Europe
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Other documents of the author: Jeger, Michael; Bragard, Claude; Caffier, David; Candresse, Thierry; CHATZIVASSILIOU, ELISAVET; Dehnen-Schmutz, Katharina; Gilioli, Gianni; Grégoire, Jean-Claude; Jaques , Josep A.; MacLeod, Alan; Navajas Navarro, María; Niere, Björn; parnell, stephen; Potting, Roel; Rafoss, Trond; Rossi, Vittorio; Urek, Gregor; van Bruggen, Ariena; van der Werf, Wopke; West, Jonathan; Winter, Stephan; Baker, Richard; Vicent, Antonio; Behring, Carsten; Mosbach-Schulz, Olaf; Stancanelli, Giuseppe
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comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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Title
Evaluation of a paper by Guarnaccia et al. (2017) on the first report of Phyllosticta citricarpa in EuropeAuthor (s)
Date
2018-01-23Publisher
WileyBibliographic citation
JEGER, Michael; BRAGARD, Claude ; CAFFIER, David; CANDRESSE, Thierry; CHATZIVASSILIOU, Elisavet; DEHNEN-SCHMUTZ, Katharina; GILIOLI, Gianni; ; GRÉGOIRE, Jean-Claude ; JAQUES, Josep A.; MACLEOD, Alan ; MACLEOD, Alan; NAVAJAS NAVARRO, María; NIERE, Björn; PARNELL, Stephen; POTTING, Roel; RAFOSS, Trond; ROSSI, Vittorio; UREK, Gregor ; VAN BRUGGEN, Ariena ; VAN DER WERF, Wopke; WEST, Jonathan; WINTER, Stephan; BAKER, Richard; VICENT, Antonio; BEHRING, Carsten; MOSBACH SCHULZ, Olaf; STANCANELLI, Giuseppe. Evaluation of a paper by Guarnaccia et al. (2017) on the first report of Phyllosticta citricarpa in Europe. EFSA Journal (2018), v. 16, n. 1Type
info:eu-repo/semantics/articlePublisher version
https://www.efsa.europa.eu/en/efsajournal/pub/5114Version
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Abstract
The Plant Health Panel reviewed the paper by Guarnaccia et al. (2017) and compared their findings
with previous predictions on the establishment of Phyllosticta citricarpa. Four species of Phyllosticta
were found ... [+]
The Plant Health Panel reviewed the paper by Guarnaccia et al. (2017) and compared their findings
with previous predictions on the establishment of Phyllosticta citricarpa. Four species of Phyllosticta
were found by Guarnaccia et al. (2017) in Europe. P. citricarpa and P. capitalensis are well-defined
species, with P. citricarpa recorded for the first time in Europe, confirming predictions by Magarey
et al. (2015) and EFSA (2008, 2014, 2016) that P. citricarpa can establish in some European citrusgrowing
regions. Two new species P. paracitricarpa and P. paracapitalensis were also described, with
P. paracitricarpa (found only in Greece) shown to be pathogenic on sweet orange fruits. Genotyping of
the P. citricarpa isolates suggests at least two independent introductions, with the population in
Portugal being different from that present in Malta and Italy. P. citricarpa and P. paracitricarpa were
isolated only from leaf litter in backyards. However, since P. citricarpa does not infect or colonise dead
leaves, the pathogen must have infected the above living leaves in citrus trees nearby. Guarnaccia
et al. (2017) considered introduction to be a consequence of P. citricarpa having long been present or
of illegal movement of planting material. In the Panel’s view, the fruit pathway would be an equally or
more likely origin. The authors did not report how surveys for citrus black spot (CBS) disease were
carried out, therefore their claim that there was no CBS disease even where the pathogen was present
is not supported by the results presented. From previous simulations, the locations where Guarnaccia
et al. (2017) found P. citricarpa or P. paracitricarpa were conducive for P. citricarpa establishment, with
number of simulated infection events by pycnidiospores comparable to sites of CBS occurrence outside
Europe. Preliminary surveys by National Plant Protection Organisations (NPPOs) have not confirmed so
far the findings by Guarnaccia et al. (2017) but monitoring is still ongoing. [-]
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