PhD Thesis in Genetics. Work in the Insect Molecular Genetics field since 1998 My research concerns the study of genetic diversity and evolution of phytophageous insect pest using molecular and bioinformatics tools with the aim of developing a protection of agronomic crops. My studies are focused on two main topics: (i) the role of Transposable elements (TEs) in genome evolution and adaptation of insects (ii) the role of metagenome in insecticide resistance