Publicação
Biotechnological control of Gonipterus spp. major defoliators of eucalypt plantations
| Resumo: | This work identified semiochemicals that might mediate host selection by the eucalyptus weevil Gonipterus platensis (Coleoptera, Curculionidae) and by its egg parasitoid Anaphes nitens (Hymenoptera, Mymaridae), as well as pheromones emitted by the weevil. Characterization of Eucalyptus globulus and G. platensis volatile organic compounds was conducted using one and two-dimensional gas chromatographic techniques, coupled to different detectors. Antennal active compounds for the weevil and for the parasitoid, were detected by gas chromatography-mass spectrometry/electroantenography. Bioassays were performed in an olfactometer and Petri dish arenas, respectively. For G. platensis, 51 compounds emitted by E. globulus elicited antennal responses, eight of which showed kairomonal activity and two allomonal property. Behavioural responses depended both on sex and physiological condition (mated or virgin) of the insects. |
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| Autores principais: | Branco, Sofia Isabel Martins |
| Assunto: | Gonipterus spp Anaphes nitens pheromones allelochemicals host selection feromonas aleloquímicos selecção de hospedeiro |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | tese de doutoramento |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | This work identified semiochemicals that might mediate host selection by the eucalyptus weevil Gonipterus platensis (Coleoptera, Curculionidae) and by its egg parasitoid Anaphes nitens (Hymenoptera, Mymaridae), as well as pheromones emitted by the weevil. Characterization of Eucalyptus globulus and G. platensis volatile organic compounds was conducted using one and two-dimensional gas chromatographic techniques, coupled to different detectors. Antennal active compounds for the weevil and for the parasitoid, were detected by gas chromatography-mass spectrometry/electroantenography. Bioassays were performed in an olfactometer and Petri dish arenas, respectively. For G. platensis, 51 compounds emitted by E. globulus elicited antennal responses, eight of which showed kairomonal activity and two allomonal property. Behavioural responses depended both on sex and physiological condition (mated or virgin) of the insects. |
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