Statistical Analysis of Grapevine Mortality Associated with Esca or Eutypa Dieback Foliar Expression
GÉGOUT-PETIT, Anne
Institut de Mathématiques de Bordeaux [IMB]
Quality control and dynamic reliability [CQFD]
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Institut de Mathématiques de Bordeaux [IMB]
Quality control and dynamic reliability [CQFD]
GÉGOUT-PETIT, Anne
Institut de Mathématiques de Bordeaux [IMB]
Quality control and dynamic reliability [CQFD]
Institut de Mathématiques de Bordeaux [IMB]
Quality control and dynamic reliability [CQFD]
REY, Patrice
Santé Végétale [SV]
Laboratoire Universitaire de Biodiversité et Ecologie Microbienne [LUBEM]
< Leer menos
Santé Végétale [SV]
Laboratoire Universitaire de Biodiversité et Ecologie Microbienne [LUBEM]
Idioma
en
Communication dans un congrès
Este ítem está publicado en
8th International Workshop on Grapevine Trunk Diseases, 2012-06, Valencia. 2012
Resumen en inglés
Esca and Eutypa dieback are the two main wood diseases in France. Their widespread distribution in vineyards leads to grapevine decline and to a loss of productivity. However, little is known about the temporal dynamics ...Leer más >
Esca and Eutypa dieback are the two main wood diseases in France. Their widespread distribution in vineyards leads to grapevine decline and to a loss of productivity. However, little is known about the temporal dynamics of these diseases on plant scale and equally, the relationships between foliar expression of the diseases and vine death is relatively unknown too. To investigate these relationships, we surveyed the vines of six vineyards cv. Cabernet Sauvignon in the Bordeaux region, by recording foliar symptoms, dead arms and dead plants from 2004 to 2010. In 2008, 2009 and 2010, about five percent of the asymptomatic vines died but the rate of dead vines, which had previously expressed Esca foliar symptoms, was higher and varied also depending on the vineyards. Whether the vines expressed foliar symptoms or not, a logistic regression statistical model was used to select the previous years of symptomatic expression associated with mortality. The mortality of Esca is always associated with the foliar symptom expression of the year preceding vine death. One or two other earlier years of expression were frequently additional risk factors. Eutypa dieback symptom was also a risk factor for death, superior or equal to that of Esca. The study of the internal necroses of vines expressing Esca or Eutypa dieback is discussed in the light of these statistical results.< Leer menos
Palabras clave en inglés
Wood disease
Epidemiology
Necroses
Logistic Regression
Orígen
Importado de HalCentros de investigación