he present study revealed a variation in the diversity of jassid species. Three (3) to five (5) jassid species were identified in the cotton basin. This abundance follows a geographical and annual dynamic according to the crop year, resulting in the appearance of more invasive and virulent species with an adaptability that is favoured by
climatic factors. The most abundant species observed during this study period were Jacobiasca lybica (Bergevin & Zanon, 1922), identified during the 2021 campaign, and Amrasca biguttula (Shiraki, 1913), identified during the 2022 campaign. Both appear to be invasive. However, Amrasca biguttula (Shiraki, 1913) appears to be the most invasive
and virulent. Its appearance has led to the virtual extinction of certain species in certain localities. It has thus disrupted the pest complex in cotton-growing areas, with damage levels exceeding the economic impact threshold throughout the cotton-growing basin. It has had a significant impact on cotton growing. It is planned to continue identifying species using molecular tools in order to extend knowledge of any species that could not be identified using conventional taxonomy. Bio-ecological studies on the life cycle of Amrasca biguttula (Shiraki, 1913), its natural enemies and the susceptibility of cotton varieties and vegetable crops to jassids are also envisaged, in order to contribute to the implementation of an ecological control strategy