Modelling the potential spread of Fusarium circinatum, the causal agent of pitch canker in EuropeReport as inadecuate

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Abstract : Context Fusarium circinatum is an invasive forest pathogen causing pitch canker in Europe. It attacks several pine species and Douglas firs. It has already invaded a few places in the Iberian Peninsula and Italy. Aims The aim of this study is to develop a model for simulating the spread of F. circinatum once it enters Europe via various entry points such as harbours, border stations and from nurseries containing tree seedlings. Methods The spread rate was modelled as a function of the spatial distribution of pine and Douglas firs, climatic suitability of different locations to F. circinatum, seedling transportation, insect-mediated transfer from tree to tree, and spread of airborne spores.ResultsThe fungus is likely to spread to the pine forests of northern Spain Galicia, Cantabria and Basque Country and southwest France Aquitania. There will be some spread towards northern Portugal and southern Italy. Unless there are new arrivals to Central and North Europe, the fungus will not spread to the more northern parts of Europe. Due to the short dispersal distance of spores, F. circinatum cannot easily cross spatial discontinuities in the distribution of host species .Conclusion F. circinatum is a serious potential invasive forest pathogen in Europe. New admittances of the spores from international trading should be controlled.

Keywords : Invasive pathogen Pine Douglas fir Spatio-temporal model Spread model Forest pathology

Author: Timo Möykkynen - Paolo Capretti Timo Pukkala



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