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A foliar disease simulation model to assist the design of new control methods against black leaf streak disease of banana

Landry Clara, Bonnot François, Ravigné Virginie, Carlier Jean, Rengifo Domingo, Vaillant Jean, Abadie Catherine. 2017. A foliar disease simulation model to assist the design of new control methods against black leaf streak disease of banana. Ecological Modelling, 359 : 383-397.

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Quartile : Q2, Sujet : ECOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Economie-gestion

Résumé : Black leaf streak disease (BLSD), caused by the fungal pathogen Mycosphaerella fijiensis, is considered as the most destructive foliar disease of banana. To advance our knowledge of the dynamics of the disease at plant scale as well as of the components of varietal resistance, we designed, calibrated and evaluated a mechanistic model to simulate the disease on a banana plant. The model runs in discrete time at plant scale and describes plant growth and pathogen dynamics under optimal epidemiological conditions. The model is divided into two modules: a deterministic plant sub-model that simulates the simplified architecture and growth of the banana, and a pathogen sub-model that simulates the detailed life cycle of the pathogen including infection, lesion growth, asexual and sexual sporulation, and the dispersal of spores on the plant. The three most influential epidemiological parameters identified by sensitivity analysis of the model (lesion growth rate, infection efficiency, and incubation period) were estimated in a Bayesian framework using Markov chain Monte Carlo methods and acquired data on the dynamics of leaf lesions under natural conditions. The posterior densities provided precise knowledge on pathogen life history traits. The evaluation of the model using an independent data set confirmed the good quality of the predictions. Simulations allowed us to evaluate the impact of host resistance components, auto-infection at plant scale, and of the leaf emergence rate, which is linked with cropping practices, on the severity of BLSD. This foliar disease simulation model will help design new methods of controlling BLSD.

Mots-clés Agrovoc : Musa, Mycosphaerella fijiensis, contrôle de maladies, modèle mathématique, modèle de simulation, port de la plante, croissance, pouvoir pathogène, méthode de lutte, conception, feuille, épidémiologie, banque de données, Musa (plantains)

Mots-clés géographiques Agrovoc : Guadeloupe, République dominicaine, France

Classification Agris : H20 - Maladies des plantes
U10 - Informatique, mathématiques et statistiques
F62 - Physiologie végétale - Croissance et développement
F50 - Anatomie et morphologie des plantes

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Agences de financement européennes : European Regional Development Fund

Auteurs et affiliations

  • Landry Clara
  • Bonnot François, CIRAD-BIOS-UMR BGPI (FRA)
  • Ravigné Virginie, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0002-4252-2574
  • Carlier Jean, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0002-6967-1852
  • Rengifo Domingo, IDIAF (DOM)
  • Vaillant Jean, UAG (GLP)
  • Abadie Catherine, CIRAD-BIOS-UMR BGPI (GLP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/584799/)

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