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Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment
Lethal time(50) (LTime(50)) and lethal temp (LTemp(50)) are commonly used laboratory indices of arthropod cold tolerance, with the former often being employed to predict winter survival in the field. In the present study, we compare the cold tolerance of different life‐history stages (nondiapausing...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Entomological Society
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282520/ https://www.ncbi.nlm.nih.gov/pubmed/30546196 http://dx.doi.org/10.1111/phen.12262 |
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author | White, Nicola Bale, Jeffrey S. Hayward, Scott A. L. |
author_facet | White, Nicola Bale, Jeffrey S. Hayward, Scott A. L. |
author_sort | White, Nicola |
collection | PubMed |
description | Lethal time(50) (LTime(50)) and lethal temp (LTemp(50)) are commonly used laboratory indices of arthropod cold tolerance, with the former often being employed to predict winter survival in the field. In the present study, we compare the cold tolerance of different life‐history stages (nondiapausing and diapausing females, as well as males and juveniles) of a major agricultural pest: the two‐spot spider mite Tetranychus urticae Koch (Acarina: Tetranychidae). Diapausing females from European populations of this species are shown to be freeze avoiding, supercooling to −23.6 ± 0.37 °C and with an LTemp(50) of −23.2 °C. However, nondiapausing females [supercooling point (SCP) –19.1 ± 0.49 °C, LTemp(50) –14.32 °C], males (SCP –21.27 ± 0.52 °C, LTemp(50) –16 °C) and juveniles (SCP –25.34 ± 0.29 °C, LTemp(50) –18.3 °C) are subclassified as strongly chill tolerant juveniles. LTime(50) is 148.3 days for non‐acclimated diapausing females, whereas nondiapausing females, males and juveniles reach 50% mortality by 21.7 days. When individuals are acclimated at 10 °C for a period of 7 days, no effect is found. Cold tolerance is suggested to be a major contributor to the successful spread of T. urticae across temperate countries, although it is dependent on a diapause trait, suggesting a potential target for control. Winter field trial data from diapausing females indicate that LTime(50) is a reliable indicator of winter survival even within diapause, supporting the use of these indices as a valuable component within environmental niche models for the prediction of future pest invasions. |
format | Online Article Text |
id | pubmed-6282520 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Entomological Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-62825202018-12-11 Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment White, Nicola Bale, Jeffrey S. Hayward, Scott A. L. Physiol Entomol Original Articles Lethal time(50) (LTime(50)) and lethal temp (LTemp(50)) are commonly used laboratory indices of arthropod cold tolerance, with the former often being employed to predict winter survival in the field. In the present study, we compare the cold tolerance of different life‐history stages (nondiapausing and diapausing females, as well as males and juveniles) of a major agricultural pest: the two‐spot spider mite Tetranychus urticae Koch (Acarina: Tetranychidae). Diapausing females from European populations of this species are shown to be freeze avoiding, supercooling to −23.6 ± 0.37 °C and with an LTemp(50) of −23.2 °C. However, nondiapausing females [supercooling point (SCP) –19.1 ± 0.49 °C, LTemp(50) –14.32 °C], males (SCP –21.27 ± 0.52 °C, LTemp(50) –16 °C) and juveniles (SCP –25.34 ± 0.29 °C, LTemp(50) –18.3 °C) are subclassified as strongly chill tolerant juveniles. LTime(50) is 148.3 days for non‐acclimated diapausing females, whereas nondiapausing females, males and juveniles reach 50% mortality by 21.7 days. When individuals are acclimated at 10 °C for a period of 7 days, no effect is found. Cold tolerance is suggested to be a major contributor to the successful spread of T. urticae across temperate countries, although it is dependent on a diapause trait, suggesting a potential target for control. Winter field trial data from diapausing females indicate that LTime(50) is a reliable indicator of winter survival even within diapause, supporting the use of these indices as a valuable component within environmental niche models for the prediction of future pest invasions. The Royal Entomological Society 2018-09-12 2018-12 /pmc/articles/PMC6282520/ /pubmed/30546196 http://dx.doi.org/10.1111/phen.12262 Text en © 2018 The Authors. Physiological Entomology published by John Wiley & Sons Ltd on behalf of Royal Entomological Society. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles White, Nicola Bale, Jeffrey S. Hayward, Scott A. L. Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title | Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title_full | Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title_fullStr | Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title_full_unstemmed | Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title_short | Life‐history changes in the cold tolerance of the two‐spot spider mite Tetranychus urticae: applications in pest control and establishment risk assessment |
title_sort | life‐history changes in the cold tolerance of the two‐spot spider mite tetranychus urticae: applications in pest control and establishment risk assessment |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282520/ https://www.ncbi.nlm.nih.gov/pubmed/30546196 http://dx.doi.org/10.1111/phen.12262 |
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