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http://dx.doi.org/10.5532/KJAFM.2013.15.4.201

Spatial Network Analysis of Pathogen Spread in Korean Rice Farming Areas Using Graph Theory  

Kang, Wanmo (Department of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Lee, Dowon (Department of Environmental Planning, Graduate School of Environmental Studies, Seoul National University)
Park, Chan-Ryul (Division of Forest Ecology, Korea Forest Research Institute)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.15, no.4, 2013 , pp. 201-209 More about this Journal
Abstract
The spread and expansion of pests and pathogens due to climate change have caused considerable reduction of rice yield in agricultural landscapes. This study was conducted to quantitatively analyze the spread of rice pathogens carried by insect pests on spatial network in South Korea using graph-theoretic methods. We identified the connectivity "backbone" of pathogen spread network among the cities along the coastal area of West Sea. In addition, we graphically represented 1) the core areas that can cause local and regional outbreaks of pathogens; and 2) the areas that act as bottlenecks in the spread of pathogen which can link the core areas. Especially, the cities in the coastal areas of West Sea that have the high density of rice crops, represented a low spread resistance to pathogen infection. These results may suggest insights into planning the integrated pest management possibly through regional collaboration.
Keywords
Climate change; Landscape resistance; Rice farming; Pathogen spread;
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