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Modelling the spatio-temporal expansion of an exotic seed chalcid , Megastigmus schimitscheki , recently introduced in southeastern France

An exotic, specialist seed chalcid, Megastigmus schimitscheki, has been introduced along with its cedar host seeds from Turkey to southeastern France during the early 1990s. It is now expanding in plantations of Atlas Cedar (Cedrus atlantica). We tested the efficiency of a reaction-diffusionadvection model to survey the spatio-temporal expansion of the insect populations. The model was also used to study the influence of some biological and spatial criteria on the species dispersal.