none no species The present study was carried out to evaluate the impact of the parasitoidic complex on the population dynamics of the pine weevil Pissodes notatus F. in a forest of southwestern France. From 1968 to 1977, the annual rate of total parasitism at weevil emergence did not fluctuate greatly, ranging mostly from 20 to 30%. The most frequently recorded parasitoids belonged to the genera Eubazus and Coeloides , they both showed a density-dependent relationship with their common host; the ratio of their respective abundance remained almost constant during the ten seasons of observation. Based on the theoretical simulation of a P. notatus cohort during its development, the average mortality of the weevil due to the parasitoids was 16% VS an average parasitism rate reaching 28% at the time of emergence. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Ecology; Population dynamics; Land and freshwater zones; Palaearctic region; Europe Pissodes notatus (Curculionidae); Hymenopteran parasites; Eubazus & Coeloides; Prevalence related to host density & mortality; Plant hosts; Pinus pinaster; Hymenopteran parasites effect on population dynamics; Prevalence; Hymenopteran parasites effects on density; Mortality; Hymenopteran parasitism effects, plant host; France; South west; Density & mortality on plant host, hymenopteran parasites effects Coeloides; Eubazus (Braconidae ); Coleopteran hosts; Pissodes notatus; Prevalence related to host density & mortality; Prevalence; Pissodes notatus (Coleoptera) density & mortality relations; France; South west; Coleopteran host density & mortality on plant host, influences