Can incomplete spatial coverage of control measures prevent invasion of fungal parasites?
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We examine the invasion of a pathogenic fungus into populations of susceptibles. Combining epidemiological concepts with percolation theory we derive and test the following hypothesis: 1) fungal invasion into a population can be stopped by rendering a threshold proportion of the population immune for infection; 2) controlling infection at randomly selected sites introduces a shield which can prevent invasion of unprotected sites; 3) the rate of invasion reduces with increasing number of randomly protected sites. The significance of these findings is that the extent at which control strategies are applied spatially can be a critical component of disease management.
Otten, W. 2004. Can incomplete spatial coverage of control measures prevent invasion of fungal parasites? In: Y. Elad, I. Pertot and A. Enkegaard, eds. Proceedings of a meeting of the WGs: Management of plant diseases and arthropod pests by BCAs and their integration in agricultural systems, S. Michele all’Adige, Trentino, Italy, 9-13 June 2004. IOBC/wprs Bulletin. 27(8): pp.251-254.