A long-term field study on the effects of dietary exposure of clothianidin to varroosis-weakened honey bee colonies

Clothianidin is a commonly used systemic insecticide in seed treatments. Residues of clothianidin can occur in nectar and pollen as a result of within-plant-translocation. Foraging bees can collect contaminated nectar or pollen. Concerns have been brought forward that exposure to pesticide residues...

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Veröffentlicht in:Ecotoxicology (London, England). - 1992. - 27(2018), 7 vom: 03. Sept., Seite 772-783
1. Verfasser: Siede, Reinhold (VerfasserIn)
Weitere Verfasser: Meixner, Marina D, Almanza, Maria T, Schöning, Ralf, Maus, Christian, Büchler, Ralph
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Ecotoxicology (London, England)
Schlagworte:Journal Article Clothianidin Honey bee Interaction Varroosis Guanidines Insecticides Neonicotinoids Pesticide Residues Thiazoles mehr... clothianidin 2V9906ABKQ
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245 1 2 |a A long-term field study on the effects of dietary exposure of clothianidin to varroosis-weakened honey bee colonies 
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520 |a Clothianidin is a commonly used systemic insecticide in seed treatments. Residues of clothianidin can occur in nectar and pollen as a result of within-plant-translocation. Foraging bees can collect contaminated nectar or pollen. Concerns have been brought forward that exposure to pesticide residues might affect colonies especially if they are weakened by varroosis. However, there are few scientific studies investigating such multiple-stressor scenarios in the context of the entire colony. To close this gapa field trial with 24 colonies was set up. The study design comprised four groups of six colonies each fed with uncontaminated sugar syrup ('C0'), or syrup spiked with 10 μg L-1 clothianidin ('C10'), 50 μg L-1 clothianidin ('C50') or 200 μg L-1 clothianidin ('C200'). C10 represented a residue concentration that may exceptionally occur and therefore a worst-case scenario, the higher dietary concentrations exceed and do not reflect fieldrealistic levels. A substantial load of 8 mites of Varroa destructor per ten gram bees in autumn was adjusted. The colonies were followed up for 328 days. The amount of brood and the strength of each colony were regularly assessed. Colony health, bee mortality, overwintering success, hive weights, and levels of in-hive residues were determined. Varroosis turned out to be the significant key factor for the endpoint colony strength. Clothianidin did not have a statistically significant impact on C0, C10 and C50 colonies. No statistical evidence was found for an interaction between varroosis andexposure to clothianidin 
650 4 |a Journal Article 
650 4 |a Clothianidin 
650 4 |a Honey bee 
650 4 |a Interaction 
650 4 |a Varroosis 
650 7 |a Guanidines  |2 NLM 
650 7 |a Insecticides  |2 NLM 
650 7 |a Neonicotinoids  |2 NLM 
650 7 |a Pesticide Residues  |2 NLM 
650 7 |a Thiazoles  |2 NLM 
650 7 |a clothianidin  |2 NLM 
650 7 |a 2V9906ABKQ  |2 NLM 
700 1 |a Meixner, Marina D  |e verfasserin  |4 aut 
700 1 |a Almanza, Maria T  |e verfasserin  |4 aut 
700 1 |a Schöning, Ralf  |e verfasserin  |4 aut 
700 1 |a Maus, Christian  |e verfasserin  |4 aut 
700 1 |a Büchler, Ralph  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Ecotoxicology (London, England)  |d 1992  |g 27(2018), 7 vom: 03. Sept., Seite 772-783  |w (DE-627)NLM098212214  |x 1573-3017  |7 nnns 
773 1 8 |g volume:27  |g year:2018  |g number:7  |g day:03  |g month:09  |g pages:772-783 
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