Abstract
Hazelnut orchards in Spain, France, and Italy were searched for parasitoids of the filbert aphid,Myzocallis coryli (Goetze). A biotype ofTrioxys pallidus Haliday was found to parasitize the aphid throughout western Europe. Wasps were imported, quarantined, mass-reared, and released in Oregon orchards.
The wasp successfully attacked and completed its development on Oregon populations of the filbert aphid. A greenhouse culture of the parasitoid was maintained continuously for over 50 generations, and approximately 30,000 adult wasps were released in western Oregon. Overwintering survival has been documented in at least 12 different locations. In 3 commercial hazelnut orchards, the parasitoids proved capable of reducing aphid population peaks by 33–48%.
Résumé
Les parasitoïdes du puceron du noisetier,Myzocallis coryli (Goetze) ont été recherchés dans des parcelles de noisetier en Espagne, en France, et en Italie. Un même biotype deTrioxys pallidus Haliday a été observé parasitant ce puceron dans toute l'Europe Occidentale. Cet insecte a été importé, passé en quarantaine, élevé en masse et lâché sur les noisetiers de l'Oregon.
Ce parasite attaque avec succès les populations du puceron du noisetier de l'Oregon, et il effectue son développement complet sur cet hôte. Un élevage continu deT. pallidus a été maintenu en serre pendant plus de 50 générations et environ 30 000 adultes ont été lâchés dans la partie Ouest de l'Oregon. Les conditions de survie hivernale ont été étudiées dans au moins 12 situations différentes. Dans 3 exploitations commerciales, les parasitoïdes se sont montrés capables d'abaisser de 33 à 48% les populations maximales du puceron.
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Messing, R.H., Aliniazee, M.T. Introduction and establishment ofTrioxys pallidus [Hym.: Aphidiidae] in Oregon, U.S.A. for control of filbert aphidMyzocallis coryli [Hom.: Aphididae] . Entomophaga 34, 153–163 (1989). https://doi.org/10.1007/BF02372664
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DOI: https://doi.org/10.1007/BF02372664