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Phytopathogenic Mollicutes
Year : 2019, Volume : 9, Issue : 1
First page : ( 69) Last page : ( 70)
Print ISSN : 2249-4669. Online ISSN : 2249-4677.
Article DOI : 10.5958/2249-4677.2019.00035.5

Impact of Orientus ishidae on “flavescence dorée” emergence in the vineyards of riparian ecosystems

Desqué Delphine1,*, Salar Pascal1, Danet Jean-Luc1, Lusseau Thierry1, Garcion Christophe1, Moreau Etienne1, Dubus Christine2, Dureuil Jocelyn3, Delbac Lionel4, Binet Delphine4, Auriol Arthur4, Thiéry Denis4, Foissac Xavier1, Malembic-Maher Sylvie1

1UMR1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, Villenave d'Ornon, France

2Vinipôle Sud Bourgogne, Chambre d'Agriculture de Saône et Loire, Davayé, France

3Chambre d'Agriculture de Saône et Loire, Davayé, France

4UMR 1065 Santé et Agroécologie du Vignoble, INRA, Bordeaux Science Agro, Villenave d'Ornon, France

*Corresponding author e-mail: Delphine Desqué (delphine.desque@inra.fr)

Online published on 25 July, 2019.

Abstract

In this study the polyphagous status of Orientus ishidae was confirmed by showing that the leafhopper is able to lay eggs, hatch and develop on different deciduous trees of a riparian ecosystem, including the grapevines of neighbouring vineyard plots. It was demonstrated that, in such habitat, the main source plants for the phytoplasma acquisition are the alder trees. Leafhoppers collected on alders were mainly infected by FD phytoplasma genotypes M50 (map-FD1) and M38 (map-FD2) and were able to efficiently transmit it back to alder plants. However the same individuals could not transmit to grapevine after 42 forced transmission trials. These results and the detection of only one M38 infected grapevine stock over a 5 year period of extensive monitoring in neighbouring vineyards, suggest a low transfer frequency of phytoplasmas from alder to grapevine by O. ishidae.

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Keywords

16SrV-C and-D phytoplasmas, alternative insect vector, transmission frequency.

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