Persistent pods of the tree Acacia caven: a natural refuge for diverse insects including Bruchid beetles and the parasitoids Trichogrammatidae, Pteromalidae and Eulophidae

Danielle Rojas-Rousse (1)

1 IRBI - Institut de recherche sur la biologie de l'insecte

The persistent pods of the tree,Acacia caven that do not fall from the tree provide opportunities for the appearance of a diverse group of insects the following season.Such pods collected during the spring of 1999 in Chile were indehiscent with highly sclerified pod walls.In contrast,persistent pods collected in Uruguay after a wet winter and spring (2002)were partially dehiscent,inducing the deterioration of the woody pods,and consequently exposing the seeds.These persistent pods are a natural refuge for insect species,namely two bruchid beetles (Pseudopachymeria spinipes, Stator furcatus ),one scolytidae(Dendroctonus sp),lepidopterous larvae,ant colonies (Camponotus sp),one species of oophagous parasitoid (Uscana espinae group senex ),the gregarious larval-pupae parasitoid Monoksa dorsiplana (Pteromalidae)and two species of Horismenus spp.(Eulophidae).The patriline of M. dorsiplana is frequently formed by 1 son +7 daughters.

Mots clés: Pseudopachymeria spinipes; Stator furcatus; Uscana espinae; Monoksa dorsiplana (Boucek); Horismenus spp.; Dendroctonus sp.; Camponotus sp.; gregarious parasitoids

Mots clés: Horismenus spp; Dendroctonus sp; Camponotus sp

Domaines: Evolution [q-bio.PE]; Biologie de la reproduction

Danielle Rojas-Rousse. Persistent pods of the tree Acacia caven: a natural refuge for diverse insects including Bruchid beetles and the parasitoids Trichogrammatidae, Pteromalidae and Eulophidae. Journal of Insect Science, 2006, 8, 1-9 p. ⟨hal-00115817⟩