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Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis / ALEXANDER DEARDEN

Swansea University Author: ALEXANDER DEARDEN

  • E-Thesis – open access under embargo until: 2nd May 2028

DOI (Published version): 10.23889/SUthesis.63589

Abstract

The Western flower thrips (WFT), Frankliniella occidentalis, ranks among the most important crop pests worldwide. Their minute size (<1.4mm), cryptic nature and profound ability to develop insecticide resistance contribute to their extensive pest status. Effective trapping using visual and chemic...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Butt, Tariq. and Loveridge, Joel.
URI: https://cronfa.swan.ac.uk/Record/cronfa63589
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first_indexed 2023-06-05T15:37:32Z
last_indexed 2023-06-05T15:37:32Z
id cronfa63589
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spelling v2 63589 2023-06-05 Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis d9aadd34498f26eb73bfdb799434ae86 ALEXANDER DEARDEN ALEXANDER DEARDEN true false 2023-06-05 The Western flower thrips (WFT), Frankliniella occidentalis, ranks among the most important crop pests worldwide. Their minute size (<1.4mm), cryptic nature and profound ability to develop insecticide resistance contribute to their extensive pest status. Effective trapping using visual and chemical attractants plays an important role in monitoring WFT, which is central to the success of integrated pest management (IPM) programmes. Direct control using sticky traps and attractants for mass trapping is not yet sufficient. Previously, most studies have evaluated individual attractants rather than combinations and a systemic approach to colour preference was lacking. The overall aim of this thesis was to identify new attractant combinations and methods for optimising sticky trap capture of WFT. Firstly, combinations of WFT attractants p- Anisaldehyde and verbenone (1:1) were best suited for trap capture compared to use as individual attractants. Secondly, a novel approach to sticky trap design and colour preference using a visual modelling approach was developed. This enabled the identification of a blue hue that was optimal for trapping WFT compared to the commercially available trap colour, which was validated under field conditions. Finally, it was shown using Y-tube olfactometry that habituation can impact the attractiveness of WFT attractants, highlighting the importance of further study. The project has clearly demonstrated methods to further improve trap capture of WFT. The findings presented could contribute to improved WFT monitoring systems and control via mass trapping. Additionally, the visual modelling approach presented could be straightforwardly extended to optimise trapping of other important pests. E-Thesis Swansea, Wales, UK Western flower thrips, Insect pest management, Visual modelling, Semiochemicals, Crop protection 2 5 2023 2023-05-02 10.23889/SUthesis.63589 COLLEGE NANME COLLEGE CODE Swansea University Butt, Tariq. and Loveridge, Joel. Doctoral Ph.D KESS2 2023-09-29T10:26:52.3502940 2023-06-05T16:35:26.0002326 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences ALEXANDER DEARDEN 1 Under embargo Under embargo 2023-06-05T16:39:26.0306416 Output 4239497 application/pdf E-Thesis – open access true 2028-05-02T00:00:00.0000000 Copyright: The Author, Alex Dearden, 2023. true eng
title Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
spellingShingle Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
ALEXANDER DEARDEN
title_short Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
title_full Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
title_fullStr Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
title_full_unstemmed Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
title_sort Optimising the impact of semiochemicals and visual cues for improved monitoring and control of the Western flower thrips, Frankliniella occidentalis
author_id_str_mv d9aadd34498f26eb73bfdb799434ae86
author_id_fullname_str_mv d9aadd34498f26eb73bfdb799434ae86_***_ALEXANDER DEARDEN
author ALEXANDER DEARDEN
author2 ALEXANDER DEARDEN
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publishDate 2023
institution Swansea University
doi_str_mv 10.23889/SUthesis.63589
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
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description The Western flower thrips (WFT), Frankliniella occidentalis, ranks among the most important crop pests worldwide. Their minute size (<1.4mm), cryptic nature and profound ability to develop insecticide resistance contribute to their extensive pest status. Effective trapping using visual and chemical attractants plays an important role in monitoring WFT, which is central to the success of integrated pest management (IPM) programmes. Direct control using sticky traps and attractants for mass trapping is not yet sufficient. Previously, most studies have evaluated individual attractants rather than combinations and a systemic approach to colour preference was lacking. The overall aim of this thesis was to identify new attractant combinations and methods for optimising sticky trap capture of WFT. Firstly, combinations of WFT attractants p- Anisaldehyde and verbenone (1:1) were best suited for trap capture compared to use as individual attractants. Secondly, a novel approach to sticky trap design and colour preference using a visual modelling approach was developed. This enabled the identification of a blue hue that was optimal for trapping WFT compared to the commercially available trap colour, which was validated under field conditions. Finally, it was shown using Y-tube olfactometry that habituation can impact the attractiveness of WFT attractants, highlighting the importance of further study. The project has clearly demonstrated methods to further improve trap capture of WFT. The findings presented could contribute to improved WFT monitoring systems and control via mass trapping. Additionally, the visual modelling approach presented could be straightforwardly extended to optimise trapping of other important pests.
published_date 2023-05-02T10:26:53Z
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score 11.013619

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