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Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L.
Overwinter colony mortality is an ongoing challenge for North American beekeepers. During winter, honey bee colonies rely on stored honey and beebread, which is frequently contaminated with the neonicotinoid insecticides clothianidin and thiamethoxam. To determine whether neonicotinoid exposure affe...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7022569/ https://www.ncbi.nlm.nih.gov/pubmed/31906066 http://dx.doi.org/10.3390/insects11010030 |
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author | Wood, Sarah C. Kozii, Ivanna V. Medici de Mattos, Igor de Carvalho Macedo Silva, Roney Klein, Colby D. Dvylyuk, Ihor Moshynskyy, Igor Epp, Tasha Simko, Elemir |
author_facet | Wood, Sarah C. Kozii, Ivanna V. Medici de Mattos, Igor de Carvalho Macedo Silva, Roney Klein, Colby D. Dvylyuk, Ihor Moshynskyy, Igor Epp, Tasha Simko, Elemir |
author_sort | Wood, Sarah C. |
collection | PubMed |
description | Overwinter colony mortality is an ongoing challenge for North American beekeepers. During winter, honey bee colonies rely on stored honey and beebread, which is frequently contaminated with the neonicotinoid insecticides clothianidin and thiamethoxam. To determine whether neonicotinoid exposure affects overwinter survival of Apis mellifera L., we chronically exposed overwintering field colonies and winter workers in the laboratory to thiamethoxam or clothianidin at different concentrations and monitored survival and feed consumption. We also investigated the sublethal effects of chronic thiamethoxam exposure on colony pathogen load, queen quality, and colony temperature regulation. Under field conditions, high doses of thiamethoxam significantly increased overwinter mortality compared to controls, with field-realistic doses of thiamethoxam showing no significant effect on colony overwinter survival. Under laboratory conditions, chronic neonicotinoid exposure significantly decreased survival of winter workers relative to negative control at all doses tested. Chronic high-dose thiamethoxam exposure was not shown to impact pathogen load or queen quality, and field-realistic concentrations of thiamethoxam did not affect colony temperature homeostasis. Taken together, these results demonstrate that chronic environmental neonicotinoid exposure significantly decreases survival of winter workers in the laboratory, but only chronic high-dose thiamethoxam significantly decreases overwinter survival of colonies in the field. |
format | Online Article Text |
id | pubmed-7022569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70225692020-03-09 Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. Wood, Sarah C. Kozii, Ivanna V. Medici de Mattos, Igor de Carvalho Macedo Silva, Roney Klein, Colby D. Dvylyuk, Ihor Moshynskyy, Igor Epp, Tasha Simko, Elemir Insects Article Overwinter colony mortality is an ongoing challenge for North American beekeepers. During winter, honey bee colonies rely on stored honey and beebread, which is frequently contaminated with the neonicotinoid insecticides clothianidin and thiamethoxam. To determine whether neonicotinoid exposure affects overwinter survival of Apis mellifera L., we chronically exposed overwintering field colonies and winter workers in the laboratory to thiamethoxam or clothianidin at different concentrations and monitored survival and feed consumption. We also investigated the sublethal effects of chronic thiamethoxam exposure on colony pathogen load, queen quality, and colony temperature regulation. Under field conditions, high doses of thiamethoxam significantly increased overwinter mortality compared to controls, with field-realistic doses of thiamethoxam showing no significant effect on colony overwinter survival. Under laboratory conditions, chronic neonicotinoid exposure significantly decreased survival of winter workers relative to negative control at all doses tested. Chronic high-dose thiamethoxam exposure was not shown to impact pathogen load or queen quality, and field-realistic concentrations of thiamethoxam did not affect colony temperature homeostasis. Taken together, these results demonstrate that chronic environmental neonicotinoid exposure significantly decreases survival of winter workers in the laboratory, but only chronic high-dose thiamethoxam significantly decreases overwinter survival of colonies in the field. MDPI 2019-12-31 /pmc/articles/PMC7022569/ /pubmed/31906066 http://dx.doi.org/10.3390/insects11010030 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wood, Sarah C. Kozii, Ivanna V. Medici de Mattos, Igor de Carvalho Macedo Silva, Roney Klein, Colby D. Dvylyuk, Ihor Moshynskyy, Igor Epp, Tasha Simko, Elemir Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title | Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title_full | Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title_fullStr | Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title_full_unstemmed | Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title_short | Chronic High-Dose Neonicotinoid Exposure Decreases Overwinter Survival of Apis mellifera L. |
title_sort | chronic high-dose neonicotinoid exposure decreases overwinter survival of apis mellifera l. |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7022569/ https://www.ncbi.nlm.nih.gov/pubmed/31906066 http://dx.doi.org/10.3390/insects11010030 |
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