ABSTRACT
Plant-aphids-parasitoid association (Hom., Aphidoidea| Hym., Aphidiidae) in central area of Chile

Petr Stary1, Fernando Rodriguez2 y Georges Remaudiere3
 

Research was made in La Cruz (V Región) city area in Central Chile. Plant-aphid-parasitoid associations were determinated from samples taken in the field and reared in the laboratory. 12 parasitoid species and 35 aphid species were determined, associated with a number of plants. AII the parasitoids species (except for those associated with Nothofagus) known from Chile were collected also in the model area. Host aphids represented common, broadly oligophagous species at the mosto Following aphids were collected for the first time in Chile: Cinara cedri Mim., Myzus (Sciamyzus) cymbalariae (Stroyan), Neotoxoptera formosana (Tak.) and Nearctaphis bakeri (Cowen). Parasitoids were found to be rather effective in regulating populations of most of the aphid species (except Aphis spiraecola Patch.); their oligophagus host range enabling the populations drifts in the course of seasonal host alternation is presumed to play an important role.

Keywords: aphids, parasitoids, associations, biocontrol.
1 lnstitute of Entomology, Academy of Sciences of the Czech Republic, Branisovska 31, 37005 Ceske BudejoYice, Czech.
2 Centro Nacional de Entomologla La Cruz, Instituto de Inyestigaciones Agropecuarias (INIA), Casilla 3, La Cruz, Chile.
3 Laboratorio d'Entomologie, Museum Natlonal d'Hlstoire Naturelle, 45 rue de Bufron, 75005 Paris, France.