Abstract
Epidemiological research on Coffea arabica (var. Typica and Bourbon) has been conducted in the Plant Pathology at the ORSTOM’s New Caledonia Centre since 1991. Its aim has been to understand the functioning of the “pathosystem” which comprises coffee, its main pathogenic fungi (Hemileia vastatrix, Colletotrichum gloeosporioides and Cercospora coffeicola) and the environment, in order to model their interrelationships. More specifically, the goal is to identify the environmental conditions which influence the dynamics of coffee diseases. Regular epidemiological surveys are carried out in arabica coffee plantations for this purpose. The biometric evaluations of these data take into account the spatial and temporal dimensions of the events occurring. The ultimate objective of this research is to use modelling to devise a decision-making tool, permitting a forecast of the risk of an epidemic in a defined environmental context (Nandris et al., 1997).
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