Spatially mixed crops to control the stratified dispersal of airborne fungal diseases - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ecological Modelling Année : 2010

Spatially mixed crops to control the stratified dispersal of airborne fungal diseases

Résumé

Intraspecific crop diversification is thought to be a possible solution to the disease susceptibility of mono-cultured crops We modelled the stratified dispersal of an airborne pathogen population in order to identify the spatial patterns of cultivar mixtures that could slow epidemic spread driven by dual dispersal mechanisms acting over both short and long distances We developed a model to simulate the propagation of a fungal disease in a 2D field including a reaction-diffusion model for short-distance disease dispersal and a stochastic model for long-distance dispersal The model was fitted to data for the spatio-temporal spread of faba bean rust (caused by Uromyces viciae-fabae) through a discontinuous field The model was used to compare the effectiveness of eight different planting patterns of cultivar mixtures against a disease spread by short-distance and stratified dispersal Our combined modelling approach provides a reasonably good fit with the observed data for the spread of faba bean rust Similar predictive power could be expected for the management of resource-mediated invasions by other airborne fungi If a disease spreads by short-distance dispersal random mixtures can be used to slow the epidemic spread since their spatial irregularity creates a natural barrier to the progression of a smooth epidemic wave In the context of stratified dispersal heterogeneous patterns should be used that include a minimum distance between susceptible units which decreases the probability of infection by long-distance spore dispersal We provide a simple framework for modelling the stratified dispersal of disease in a diversified crop The model suggests that the spatial arrangement of components in cultivar mixtures has to accord with the dispersal characteristics of the pathogen in order to Increase the efficiency of diversification strategies in agro-ecosystems and forestry It can be applied in low Input agriculture to manage pathogen invasion by intercropping and cultivar mixtures and to design sustainable systems of land use (C) 2010 Elsevier B V All rights reserved

Dates et versions

hal-01455967 , version 1 (03-02-2017)

Identifiants

Citer

Natalia Sapoukhina, Yuri Tyutyunov, Ivan Sache, Roger Arditi. Spatially mixed crops to control the stratified dispersal of airborne fungal diseases. Ecological Modelling, 2010, 221 (23), pp.2793 - 2800. ⟨10.1016/j.ecolmodel.2010.08.020⟩. ⟨hal-01455967⟩
90 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More