Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success?
The larger grain borer, Prostephanus truncatus (Horn) is an invasive insect pest species of global economic concern. It however remains unknown how P. truncatus succeeds under increasing temperatures and desiccation effects associated with projected climate change. Here, we investigated the effects...
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Wiley and Royal Entomological Society
2022
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| Online Access: | https://doi.org/10.1111/phen.12355 http://hdl.handle.net/11408/4962 |
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| author | Mutamiswa, Reyard Machekano, Honest Singano, Charles Joseph, Virgil Chidawanyika, Frank Nyamukondiwa, Casper |
| author_facet | Mutamiswa, Reyard Machekano, Honest Singano, Charles Joseph, Virgil Chidawanyika, Frank Nyamukondiwa, Casper |
| author_sort | Mutamiswa, Reyard |
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| description | The larger grain borer, Prostephanus truncatus (Horn) is an invasive insect pest species of global economic concern. It however remains unknown how P. truncatus succeeds under increasing temperatures and desiccation effects associated with projected climate change. Here, we investigated the effects of desiccation and high-temperature stress on physiological fitness of P. truncatus larvae and adults. Specifically, we measured critical thermal maxima, heat knockdown time and water loss rates following heat and desiccation acclimation. Results showed beneficial heat acclimation effects on heat tolerance (critical thermal maxima and heat knockdown time). Similarly, desiccation acclimation significantly improved both heat tolerance traits, indicating cross-tolerance effects, not for heat knockdown time in larvae. In all cases, adults exhibited more improved heat tolerance than larvae. Conversely, heat acclimation increased water loss rates, and more so in larvae than adults. Improved heat tolerance plus abiotic stress cross-tolerance of P. truncatus may explain its enhanced physiological and ecological fitness in dry tropical and changing climate environments. These results are important in explaining the role of physiology in insect invasions and may inform pest management and forecasting. |
| format | Article |
| id | ir-11408-4962 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | Wiley and Royal Entomological Society |
| record_format | dspace |
| spelling | ir-11408-49622022-07-14T10:44:56Z Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? Mutamiswa, Reyard Machekano, Honest Singano, Charles Joseph, Virgil Chidawanyika, Frank Nyamukondiwa, Casper temperature resistance larger grain borer Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) invasive insect pest species desiccation effects The larger grain borer, Prostephanus truncatus (Horn) is an invasive insect pest species of global economic concern. It however remains unknown how P. truncatus succeeds under increasing temperatures and desiccation effects associated with projected climate change. Here, we investigated the effects of desiccation and high-temperature stress on physiological fitness of P. truncatus larvae and adults. Specifically, we measured critical thermal maxima, heat knockdown time and water loss rates following heat and desiccation acclimation. Results showed beneficial heat acclimation effects on heat tolerance (critical thermal maxima and heat knockdown time). Similarly, desiccation acclimation significantly improved both heat tolerance traits, indicating cross-tolerance effects, not for heat knockdown time in larvae. In all cases, adults exhibited more improved heat tolerance than larvae. Conversely, heat acclimation increased water loss rates, and more so in larvae than adults. Improved heat tolerance plus abiotic stress cross-tolerance of P. truncatus may explain its enhanced physiological and ecological fitness in dry tropical and changing climate environments. These results are important in explaining the role of physiology in insect invasions and may inform pest management and forecasting. 2022-07-14T10:44:56Z 2022-07-14T10:44:56Z 2021 Article 0307-6962 1365-3032 https://doi.org/10.1111/phen.12355 http://hdl.handle.net/11408/4962 en Physiological Entomology;Volume 46, Issue 2; Pages 157-166 open Wiley and Royal Entomological Society |
| spellingShingle | temperature resistance larger grain borer Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) invasive insect pest species desiccation effects Mutamiswa, Reyard Machekano, Honest Singano, Charles Joseph, Virgil Chidawanyika, Frank Nyamukondiwa, Casper Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title | Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title_full | Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title_fullStr | Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title_full_unstemmed | Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title_short | Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success? |
| title_sort | desiccation and temperature resistance of the larger grain borer, prostephanus truncatus (horn) (coleoptera: bostrichidae): pedestals for invasion success? |
| topic | temperature resistance larger grain borer Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) invasive insect pest species desiccation effects |
| url | https://doi.org/10.1111/phen.12355 http://hdl.handle.net/11408/4962 |
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