Parasitoids associated with Anastrepha fraterculus (Diptera: Tephritidae) in different host plants in Misiones, Argentina

OVRUSKI, S. M.; O. R., DE COLL; P., SCHLISERMAN Y G. TIETJEN; OVRUSKI, S. M.; O. R., DE COLL; P., SCHLISERMAN Y G. TIETJEN

Mendoza - argentina

Otro; 4th Meeting of the Working Group on Fruit Flies of the western Hemisfere.; 2001

Working Group on Fruit Flies of the western Hemisfere

  The diversity of himenopterous parasitoids associated with Anastrepha fraterculus(Wiedemann) in host plants in the northeastern province of Misiones (Argentina) is reported. Mature fruits samples were collected between 1999 – 2001 from rural areas of Montecarlo locality, Misiones. Six fruit species belonging to three families were sampled: Psidium gajava L. (guava) (Myrtaceae). Feijoa sellowiana Berg (Berg) (Myrtaceae), Prunus persica (L.) Batsh (Peach) (Rosaceae) , Citrus paradisi Macfadyen (grapefruit) (Rutaceae), Citrus reticulata Blanco (Tangerine) (Rutaceae), and Eriobotrya japonica (Thumb) Lindl. (loquat) (Rutaceae). Samples were weighed, and the number of fruits and larvae counted. South American fruit fly and parasitoid adults recovered from these samples were identified and counted. We sampled 1,486 fruits, with represented 36.4 Kg. From these we recovered 497 hymenopteran parasitoids from 1,648 puparia of A. fraterculus. The majority of the parasitoids (88.3%) helonged to the braconid subfamily Opiinae, with Doryctobracon areolatus (Szepligeti) the most commonly encountered species (65,5%). Two other Opiines, namely D. brasiliensis (Szepligeti) and Utetes anastrephae (Viereck) were also obtained but in much smaller number (17,3% and 5,5 % respectively). An unidentified Aliisine braconid species accounted for an additiponal 1,6 % of the individuals reared from A. frsaterculus. One eucoilid parasitoid species, namely Aganaspis pelleranoi (Brethes) was also associated with A. fraterculus. All parasitoid species are larval-pupal endoparasitois, emerging from the fly puparium. The parasitization level was 43,2 %. Although the results provided here are preliminary an important number of parasitoids associated with A. fraterculus was identified.