Pre-release risk assessment of the egg-parasitoid Gryon pennsylvanicum for classical biological control of Leptoglossus occidentalis.

Virgilio Caleca, Roversi, Sabbatini Peverieri, Strong, Maltese, Furlan, Matteo Maltese

Risultato della ricerca: Articlepeer review

8 Citazioni (Scopus)

Abstract

Leptoglossus occidentalis Heidemann (Heteroptera: Coreidae) is a North American conifer seed pest that was accidentally introduced to Europe. In the Mediterranean area, it threatens the production of Pinus pinea Linna- eus seeds. The egg-parasitoid Gryon pennsylvanicum (Ashmead) (Hymenop- tera: Platygastridae), the main natural enemy in the native range of L. occidentalis, was imported from British Columbia to Italy. Pre-release risk assessments were made under quarantine conditions by no-choice tests conducted with na€ıve and experienced G. pennsylvanicum offering single eggs of target and non-target species for varying exposure times (1, 4, 48 h). G. pennsylvanicum successfully parasitized from 75% to 100% of the target host eggs. Only one female specimen of the egg-parasitoid emerged from a non-target egg (Gonocerus juniperi Herrich-Schaeffer, He- teroptera: Coreidae). Two dead female specimens were found, one inside an egg of Coreus marginatus (Linnaeus) (Heteroptera: Coreidae) and one in an egg of Camptopus lateralis (Germar) (Heteroptera: Alydidae). All three cases occurred at the longest oviposition exposure time. Results obtained with this conservative approach suggest that the risk to non-target species of releasing G. pennsylvanicum in Italy is low.
Lingua originaleEnglish
pagine (da-a)27-35
Numero di pagine9
RivistaJournal of Applied Entomology
Volume138
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Insect Science

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