A5088989833- Control Systems and Identification
- Plant Virus Research Studies
- Advanced Control Systems Optimization
- Statistical Methods and Inference
- Evolution and Genetic Dynamics
- Insect-Plant Interactions and Control
- Soil Geostatistics and Mapping
- Data-Driven Disease Surveillance
- Stochastic processes and financial applications
- Plant Disease Resistance and Genetics
- Plant Parasitism and Resistance
- Bayesian Methods and Mixture Models
- Advanced Numerical Analysis Techniques
- Plant and animal studies
- Animal Disease Management and Epidemiology
- Point processes and geometric inequalities
- Milk Quality and Mastitis in Dairy Cows
- Insect and Pesticide Research
- Land Use and Ecosystem Services
- Fault Detection and Control Systems
- Powdery Mildew Fungal Diseases
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Insect Pheromone Research and Control
- Insect Pest Control Strategies
- Agriculture and Rural Development Research
Biostatistique et Processus Spatiaux
2013-2023
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2000-2022
Institut National de la Recherche Agronomique
2001-2014
Zimmer Biomet (France)
1996-2003
Institut National de la Recherche Agronomique du Niger
2001
AgroParisTech
2000
Laboratoire Informatique d'Avignon
2000
Plant viruses are submitted to narrow population bottlenecks both during infection of their hosts and horizontal transmission between host individuals. The size exerted on virus populations plant invasion has been estimated in a few pathosystems but is not addressed yet for transmission. Using competition aphid two Potato Y variants, one them being noninfectious equally transmissible, we obtained estimates the an insect-borne its We found that transmitted average 0.5-3.2 particles, which...
The effective size of populations (Ne) determines whether selection or genetic drift is the predominant force shaping their structure and evolution. Populations having high Ne adapt faster, as acts more intensely, than low Ne, where random effects dominate. Estimating for various steps plant virus life cycle has been focus several studies in last decade, but no estimates are available vertical transmission viruses, although seed economically significant at least 18% viruses one species. Here...
Uncovering how natural selection and genetic drift shape the evolutionary dynamics of virus populations within their hosts can pave way to a better understanding emergence. Mathematical models already play leading role in these studies are intended predict future emergences. Here, using high-throughput sequencing, we analyzed within-host population four Potato Y (PVY) variants differing at most by two substitutions involved pathogenicity properties. Model procedures were used compare...
Abstract Winter tree pruning is a cultural practice known to modify vegetative growth, which likely affect the development of pests. However, it has been poorly addressed as control method for diminishing population levels green peach aphid, Myzus persicae (Sulzer) (Homoptera: Aphididae), in [ Prunus persica (L.) Batsch (Rosaceae)] orchards. In this study, we conducted 2‐year, on‐station experiment evaluate how winter affects peach– M. interactions, by examining aphid dynamics, and crop...
By combining high-throughput sequencing (HTS) with experimental evolution, we can observe the within-host dynamics of pathogen variants biomedical or ecological interest. We studied evolutionary five Potato virus Y (PVY) in 15 doubled-haploid lines pepper. All plants were inoculated same mixture and variant frequencies determined by HTS eight each pepper line at six sampling dates. developed a method for estimating intensities selection genetic drift multi-allelic Wright-Fisher model,...
Frankliniella occidentalis (Pergande) is a key pest of various crops worldwide. In this study, we analyse the dependence infestation on spatially distributed micro climatic factors in rose greenhouse. Despite importance subject, few existing studies have been realized laboratory rather than greenhouse conditions. However, recent progress microclimate characterisation has highlighted strong indoor climate heterogeneity that may influence within-crop distribution. both (air temperature and...
The analysis of animal movement within different landscapes may increase our understanding how landscape features affect the perceptual range animals. Perceptual is linked to probability an via a dispersal kernel, latter being generally considered as spatially invariant but could be affected. We hypothesize that spatial plasticity animal's kernel greatly modify its distribution in time and space. After radio tracking movements walking insects (Cosmopolites sordidus) banana plantations, we...
We present an extended definition of the second-order stationarity concept. This is based on theory harmonic analysis for semigroups with involution. It provides a spectral representation wide class processes which are non-stationary in usual weak sense, and allows miscellaneous results to be unified. Many applications given illustrate Most these already known, %as symmetric, locally %stationary, stationary reducible by space transformation, %multiplicative-stationary or independent...
In this article, we consider a model allowing the analysis of multivariate data, which can contain data attributes different types (e.g., continuous, discrete, binary). This is two-level hierarchical supports wide range correlation structures and accommodate overdispersed data. Maximum likelihood estimation parameters achieved with an automated Monte Carlo expectation maximization algorithm. Our method tested in simulation study bivariate case applied to set dealing beehive activity.
We propose an extension of the classical complete spatial randomness tests to nonstationary Poisson processes. The method consists first performing locally and then grouping local results into a global test. test is for process assumption, whereas can be used in exploratory way decide whether observed regular or clustered if we do not reject inhomogeneous assumption. Under Cox optimal partition sampling window derived. Finally, present some examples from forestry weed sciences.