Ecole Nationale Supérieure Agronomique de Montpellier ... - CIAM

prunorum’: the infectious reimmigrants would be the main vectors of the phytoplasma; they
would inoculate susceptible plants when they return to reproduce on Prunus at the end of the
winter; emerging psyllids would get infected when living on an infected plant, either
cultivated or wild and, after migrating to overwinter on the conifers, the insects would either
conserve or multiply the phytoplasma. In this scenario, the wild Prunus may play a central
role because they produce numerous vectors and they are reservoirs of the phytoplasma
(Carraro et al., 2002); on the contrary, most of the cultivated Prunus are treated with
insecticides and some of them are second-hand hosts to the vector, and thus their contribution
to the pool of C. pruni is limited. Some questions remain about the distances and trajectory of
the migratory flights, but this scenario implies a regional scale for the spread of the
phytoplasma, as the migrations of C. pruni seem to occur at distances of several tens of
kilometers.
ACKNOWLEDGMENTS
This work was partly supported by the INRA / Région Languedoc-Roussillon program
PSDR and by the INRA AIP EpiEmerge. The experimental overwintering of C. pruni was
undertaken with the collaboration of ONF and Parc National des Cévennes.
REFERENCES
Carraro L., Osler R., Loi N., Ermacora P., Refatti E. (1998). Transmission of European
stone fruit yellows phytoplasma by Cacopsylla pruni. Journal of Plant Pathology 80: 233-239
Carraro L., Loi N., Ermacora P. (2001). Transmission characteristics of the European
stone fruit yellows phytoplasma and its vector Cacopsylla pruni. European Journal of Plant
Pathology 107: 695-700
Carraro L., Ferrini F., Ermacora P., Loi N. (2002). Role of wild Prunus species in the
epidemiology of European stone fruit yellows. Plant Pathology 51: 513-517
Carraro L., Ferrini F., Labonne G., Ermacora P., Loi N. (2004). Seasonal infectivity of
Cacopsylla pruni, vector of European stone fruit yellows phytoplasma. Annals of Applied
Biology 144: 191-195
Christensen N. M., Nicolaisen M., Hansen M., Schulz A., 2004. Distribution of
phytoplasmas in infected plants as revealed by real-time PCR and bioimaging. Molecular
Plant-Microbe Interactions 17 (11): 1175-1184
Delic D., Martini M., Ermacora P., Carraro L., Myrta A. (2005). First report of fruit tree
phytoplasmas and their psyllid vectors in Bosnia and Herzegovina. Journal of Plant Pathology
87: 149-150
Fialova R., Navratil M., Valova P., Kocourek F., Poncarova-Vorackova Z., Lauterer P.
(2004). Epidemiology of European stone fruit yellows phytoplasma in the Czech Republic.
Acta Horticulturae 657: 483-487
Hodkinson I.D., White I.M., 1979. Homoptera Psylloidea. Handbooks for the
identification of British insects II (5). Royal Entomological Society of London
Jarausch W., Danet J. L., Labonne G., Dosba F., Broquaire J.M., Saillard C., Garnier M.
(2001). Mapping the spread of apricot chlorotic leaf roll (ACLR) in southern France and
implication of Cacopsylla pruni as a vector of European stone fruit yellows (ESFY)
phytoplasmas. Plant Pathology 50: 782-790
Jarausch W.; Peccerella T.; Schwind N.; Jarausch B., Krczal G., 2004.Establishment of a
quantitative real-time PCR assay for the quantification of apple proliferation phytoplasmas in
plants and insects. Acta Horticulturae 657: 415-420
Labonne G., Lichou J. (2004). Data on the life cycle of Cacopsylla pruni, psyllidae vector
of European stone fruit yellows (ESFY) phytoplasma, in France. Acta Horticulturae 657: 465-
470
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