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Reference: Impact of grafting type on Esca foliar symptoms
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Abstract-

Aim: The aim of the survey was to investigate if the grafting type influences the foliar expression of Esca during summer.
Methods and Results: Observations were conducted on plots distributed in two French winegrowing regions (two different climatic regions) with two varieties (Cabernet-Sauvignon in the Bordeaux region and Mourvèdre in Provence). Three grafting types were compared: Omega graft, Whip and Tongue graft, and full cleft graft. For both varieties, we found a significant effect of the type of grafting on the foliar development of Esca symptoms. Full cleft grafted plots showed a significantly lower percentage of Esca foliar symptoms than the other two modalities, which were not significantly different from one another. Concerning Omega grafted plots, a significant difference in the rate of Esca foliar symptoms was highlighted compared to full cleft grafted plots, with a higher rate on Omega grafted plots, but these plots were also younger.
Conclusions: The study established, for the first time, the difference between full cleft field grafted plots and Omega and Whip and Tongue grafted plots, revealing a higher incidence of Esca on the latter types of grafting.
Significance and impact of the study: The spread of mechanical graft could be one of the factors explaining the increasing incidence of Esca in vineyard.

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Link to paper-

http://oeno-one.eu/article/view/1408

http://dx.doi.org/10.20870/oeno-one.2016.50.4.1408


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Publication Details

Published: 2017
Publication: Oeno One
Issue: 2017 51-2
Author: Mary S 2017
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