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Information aboutthe geographic distribution of agricultural pests is the basis for allpest-related agricultural and environmental protection policies. However, oftenthe pest’s records are incomplete and uncertain. Even with limitations, thepest records are needed for any country to organize a system for agricultureprotection and to mobilize surveillance efforts. The first point is to identifythe imminence of biological invasions, which can be accomplished through thecollection of data on pest distribution. The basic information to evaluate thepredictability of an invasion is geographic distribution and the identificationof pathway types associated with the potential invader. Thus, the level of therisk of introduction is assessed more objectively. In this article, cases ofintroduction of pests were analyzed from published reports in Brazil in termsof their geographic distribution at the time of their introduction. Taking intoconsideration the country’s extensive terrestrial borders, this study attemptsto elucidate the role played by different pathways in each bioinvasion. Thisanalysis recognized the limitations of the historical method and underlyinguncertainties of each invasion event. Human-mediated pathways were the mainsource of agricultural pest invasions in Brazil and the country was more adisperser than a receptor of exotic agricultural pests and diseases in SouthAmerica. A new geographical hotspot Northern South America and CaribbeanRegion for possible invasions was identified.

KEYWORDS

Bioinvasions, Biosecurity, Surveillance, Borders, Dispersion, Invasion Biology, Risk Analysis

Cite this paper

Lopes-da-Silva, M. , Sanches, M. , Stancioli, A. , Alves, G. and Sugayama, R. 2014 The Role of Natural and Human-Mediated Pathways for Invasive Agricultural Pests: A Historical Analysis of Cases from Brazil. Agricultural Sciences, 5, 634-646. doi: 10.4236-as.2014.57067.





Autor: Marcelo Lopes-da-Silva, Marcio Martinello Sanches, Andréa Ramos Stancioli, Giliardi Alves, Regina Sugayama

Fuente: http://www.scirp.org/



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