No abstract

Due to favorable climatic and soil conditions, Moroccan rice cultivation is practiced entirety in the lowest region of the Gharb plain. The systematic study of the colopterological group at ten stations covering all the rice fields during 2015 and 2016 rice periods revealed a great diversity in comparison with other similar environments. The 39 species were sampled belonging to 12 families with a predominance of predation species. The biogeographically analysis of this entomofauna reveals prevalence of the Mediterranean species which has relation with the location of the Gharb plain in protected area from Saharan influence. Finally, the biotypological study of this colopterological group during the two cycle's season's highlights the individualization of three groups of species organized in a continuum around the two level factorial of PCA: species with summer, fall development and species which sampled throughout the rice growing season.

Due to favorable climatic and soil conditions, Moroccan rice cultivation is practiced in its entirety in the lowest region of the Gharb plain. The systematic study of the colopterological stand at ten stations covering all the rice fields during the two 2015 and 2016 rice seasons revealed that it is very diversified in comparison with other similar environments. Indeed, the latter has 39 species spread over 12 families, with a predominance of species described as a great power of predation and which are of vital interest against the proliferation of living species at the expense of the rice plant. Similarly, the biogeographical analysis of this entomofauna reveals the predominance of the Mediterranean character and the scarcity of other elements of various origins. This in relation with the location of the Gharb plain in an area protected from Saharan influence by the three parallel mountain ranges. Finally, the biotypological study of this colopterological stand during the two cropping seasons allowed the individualization of three groups of species during the phenological cycle of rice: species with summer development; fall-rearing species and species harvested throughout the crop cycle..