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Crop pathogen emergence and evolution in agro-ecological landscapes.
Julien Papaïx1, Jeremy J Burdon2, Jiasui Zhan3
1UMR 1290 BIOGER, INRA Thiverval-Grignon, France ; UR 341 MIA, INRA Jouy-en-Josas, France ; UR 546 BioSP, INRA Avignon, France ; CSIRO Agriculture Flagship Canberra, ACT, Australia.
Evolutionary Applications
|May 1, 2015
Summary
Agricultural landscapes with natural vegetation patches can influence crop disease spread. Landscape structure impacts pathogen emergence and adaptation, offering tools for disease management.
Area of Science:
- Ecology
- Evolutionary Biology
- Plant Pathology
Background:
- Remnant natural vegetation in agricultural landscapes affects crop pathogen epidemiology and evolution.
- The role of the agro-ecological interface's composition, spatial configuration, and persistence on crop diseases is understudied.
Purpose of the Study:
- To investigate how spatial and temporal distribution of remnant wild vegetation patches influence crop pathogen emergence and specialization.
- To understand the impact of landscape structure on pathogen adaptation to crop hosts.
Main Methods:
- Development of a demographic-genetic simulation model.
- Simulation of pathogen dynamics in agricultural landscapes with varying remnant vegetation.
Main Results:
- Landscape structures supporting larger wild pathogen populations facilitated crop pathogen emergence.
- These same structures reduced pathogen adaptation potential to crops.
- Pathogen evolutionary trajectory depended on interactions between landscape structure and pathogen life history.
Conclusions:
- Landscape management of remnant vegetation influences crop disease emergence and evolution.
- Understanding these dynamics can inform predictive tools for agricultural disease management practices.
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