1. A Spatio-temporal Stochastic Model for an Emerging Plant Disease Spread in a Heterogeneous Landscape
- Author
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Jean Vaillant, Catherine Abadie, Franc¸ois Bonnot, Clara Landry, Laboratoire de Mathématiques Informatique et Applications (LAMIA), and Université des Antilles (UA)
- Subjects
0106 biological sciences ,Stochastic modelling ,Computer science ,Fungus ,Musa (bananes) ,010603 evolutionary biology ,01 natural sciences ,010104 statistics & probability ,Maladie des plantes ,[MATH.MATH-ST]Mathematics [math]/Statistics [math.ST] ,Pseudocercospora fijiensis ,Musa (plantains) ,0101 mathematics ,ComputingMilieux_MISCELLANEOUS ,H20 - Maladies des plantes ,[STAT.AP]Statistics [stat]/Applications [stat.AP] ,biology ,U10 - Informatique, mathématiques et statistiques ,Maladie foliaire ,Sampling (statistics) ,Maladie fongique ,[STAT.TH]Statistics [stat]/Statistics Theory [stat.TH] ,biology.organism_classification ,Plant disease ,Spore ,Théorie bayésienne ,Biological dispersal ,Maladie des raies noires ,Modèle stochastique ,Cartography - Abstract
Black Leaf Streak Disease (BLSD) is the most severe foliar disease of banana and plantain. BLSD is caused by Pseudocercospora fijiensis, an ascomycete fungus which produces wind-borne spores responsible for its spatial dispersal. In order to evaluate the BLSD long-distance dispersal and to better understand the effect of environmental factors on its invasive spatial spread, a spatio-temporal study was set up during the recent BLSD invasion in the Martinique island (FWI). Disease detection was carried out from September2010 to May 2012 and sampling squares were defined from a regular spatial grid built over the island. In this paper, we consider a stochastic model of spatio-temporal propagation of BLSD in an heterogeneous landscape and we present mathematical and computational results for this continuous-time model. Statistical inference of parameters is carried out from presence-absence data using a Bayesian framework based on a data augmentation method with respect to square first colonization times. Parameter posterior distribution calculations made possible the evaluation of the BLSD long-distance dispersal and land-cover influence on the disease propagation. Our results enabled the re-enactment of the invasion.
- Published
- 2021
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