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Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa
Dissertation (MSc (Chemistry))--University of Pretoria, 2020.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2022
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| _version_ | 1867613612089016320 |
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| access_status_str | Open Access |
| author2 | Bouwer, Marc Clement |
| author_browse | Bouwer, Marc Clement |
| author_facet | Bouwer, Marc Clement |
| collection | Thesis |
| dc_rights_str_mv | © 2021 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Chemistry))--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/87114 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:54.752Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/87114 Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa Bouwer, Marc Clement Slippers, Bernard Rohwer, Egmont Richard luki-marie.scheepers@fabi.up.ac.za Scheepers, Luki-Marié UCTD Dissertation (MSc (Chemistry))--University of Pretoria, 2020. In this study, we investigated the pheromones of Gonipterus species 2 (Coleoptera: Curculionidae) and Nudaurelia clarki (Lepidoptera: Saturniidae). These insects are two South African plantation pests that have caused the forestry industry tremendous economic losses due to defoliation. The development of pheromonebased management tools for these pests can ensure sustainable and effective pest control without detrimental effects to surrounding environments. Our results showed that Gonipterus sp. 2 produces at least cis- and transverbenol, which were described as putative pheromone components for G. platensis. Female headspace samples contained larger concentrations of the same volatiles than male samples. Furthermore, topical application of Juvenile hormone III does not induce pheromone production in Gonipterus sp. 2. The described pheromone of N. cytherea, Z-dec-5-en-1-yl-3-methylbutanoate, was shown to be effective for trapping N. clarki in KZN. The synthesized pheromone consisted of four electroantennographically active compounds, and attracted numerous N. clarki male moths species-specifically. We report on the first instance of female autodetection in the Saturniidae family, because female N. clarki antennae also detect the pheromone. The attractiveness of the same pheromone to both N. cytherea and N. clarki, together with preliminary genetic evidence that shows identical cytochrome oxidase I sequences between these species, reveal that these two species might actually be one. Future development of pheromone-based pest management strategies requires confirmation of the attractiveness of cis- and transverbenol to Gonipterus sp. 2, and optimizing N. clarki pheromone-based trapping for use in mass-trapping or mating disruption mechanisms. Chemistry MSc (Chemistry) Unrestricted 2022-09-07T12:47:54Z 2022-09-07T12:47:54Z 2020 2020 Dissertation * A2020 https://repository.up.ac.za/handle/2263/87114 en © 2021 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title | Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title_full | Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title_fullStr | Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title_full_unstemmed | Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title_short | Semiochemical studies of Gonipterus sp. 2 (Curculionidae) and pheromone-based masstrapping of Nudaurelia clarki (Saturniidae) in South Africa |
| title_sort | semiochemical studies of gonipterus sp 2 curculionidae and pheromone based masstrapping of nudaurelia clarki saturniidae in south africa |
| topic | UCTD |
| url | https://repository.up.ac.za/handle/2263/87114 |