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Electrophysiological Responses of Trissolcus japonicus, T. basalis, and T. oenone (Hymenoptera: Scelionidae) to Volatile Compounds Associated with New Zealand Stink Bugs (Hemiptera: Pentatomidae).
Saunders, Thomas E; Manning, Lee-Anne M; Avila, Gonzalo A; Holwell, Gregory I; Park, Kye Chung.
Afiliação
  • Saunders TE; Te Kura Matauranga Koiora, School of Biological Sciences, Waipapa Taumata Rau, University of Auckland, Private Bag 92019, Auckland, New Zealand. Tom.Saunders@auckland.ac.nz.
  • Manning LM; The New Zealand Institute for Plant & Food Research Limited, Auckland, New Zealand. Tom.Saunders@auckland.ac.nz.
  • Avila GA; Better Border Biosecurity, . Tom.Saunders@auckland.ac.nz.
  • Holwell GI; The New Zealand Institute for Plant & Food Research Limited, Auckland, New Zealand.
  • Park KC; Better Border Biosecurity.
J Chem Ecol ; 2024 Aug 03.
Article em En | MEDLINE | ID: mdl-39095554
ABSTRACT
Parasitoid biological control agents rely heavily on olfaction to locate their hosts. Chemical cues associated with hosts and non-hosts are known to influence the expression of host preferences and host-specificity. A better understanding of how and why parasitoids attack some species and not others, based on volatile organic compounds associated with potential hosts, can provide key information on the parasitoid's host preferences, which could be applied to pre-release risk assessments for classical biological control agents. Electrophysiological techniques such as electroantennography (EAG) and GC-EAD (gas chromatography coupled with electroantennographic detection) are widely used to identify bioactive semiochemicals. But the application of these techniques to understanding how chemical ecological cues mediate parasitoid host specificity has not been as thoroughly explored. We conducted GC-EAD and EAG studies to identify olfactory-active compounds associated with adult females of nine stink bug species from Aotearoa/New Zealand on the antennae of three closely related parasitoid species Trissolcus japonicus Ashmead, a pre-emptively (= proactively) approved biocontrol agent against brown marmorated stink bug; T. basalis (Wollaston), a biocontrol agent introduced against Nezara viridula L. in 1949; and T. oenone Johnson, a native Australasian pentatomid parasitoid. Eight compounds associated with stink bugs elicited antennal responses from all three parasitoids, and we were able to identify seven of these. (E)-2-hexenal, (E)-4-oxo-2-hexenal, (E)-2-octenal and (E)-2-decenal generally elicited stronger responses in the three parasitoids, while n-tridecane, n-dodecane, and (E)-2-decenyl acetate elicited weaker responses. We discuss how and why the results from electrophysiological experiments can be applied to non-target risk assessments within biological control programmes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Chem Ecol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Nova Zelândia País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Chem Ecol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Nova Zelândia País de publicação: Estados Unidos