HADJ KACEM, Ali2023-03-222023-03-222014https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/5804Ladybugs made a useful insect fauna group that plays a very important in biological control. Indeed, the present work focuses on the study of the role of ladybugs among insect populations useful in the valley of M’Zab. In this context, we used three methods of sampling sites in three surveys for four months. The results revealed the presence of six species of ladybugs are :coccinella Algérica , Adonia variegata , Pharascymnus numidicus , Pharascymnus ovoidus , Pullus sp Pullus sturalis . . Similarly, it was noted that the El- Atteuf station is the richest ladybugs site, it contains 6 species, the following happens site Dayah with 5 species and finally the Beni Izgeun with 4 species.frCoccinelles -entomofaune utile - Biodiversité- vallée du M’ZabLadybugs - entomofaune useful - Biodiversity - Zab valleyالتنوع البيولوجي، الدعسوقات، الحشرات المفيدة