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Universidad de Chile (2011)

Estudios epidemiológicos del repilo del olivo causado por Fusicladium oleagineum

Páez Wallberg, Paula Alejandra

Titre : Estudios epidemiológicos del repilo del olivo causado por Fusicladium oleagineum

Auteur : Páez Wallberg, Paula Alejandra ;

Université de soutenance : Universidad de Chile

Grade : Magíster en Ciencias Agropecuarias mención Sanidad Vegetal 2011

Résumé
The olive leaf spot caused by Fusicladium oleagineum (Castagne) is widespread in the Mediterranean basin and other world regions were olive trees are grown. The disease causes premature defoliation which result in a progressive weakening of the tree and a significant decrease in productivity. It is important to understand the epidemiology of the fungus to achieve adequate control of the disease. In this work the critical periods of infection were established for the Coquimbo, Valparaíso and Metropolitan regions, where the higher disease incidence occurred during the fall and winter months, with a strong dependence of climatic parameters mainly rainfall, but disease was observed to occur before the first fall rains as a result of morning dew. The sporulation dynamics of F. oleagineum in one orchard in the Atacama and one orchard in the Metropolitan Regions were also determined. Fall and spring time were confirmed as the periods with the highest sporulation. Finally, the susceptibility of 6 olive cultivars was studied in a commercial orchard located in the Metropolitan Region. Bossana and Coratina were susceptible while Arbosana, Frantoio, Koroneiki and Leccino were moderately susceptible

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