Large-scale monitoring of effects of clothianidin-dressed oilseed rape seeds on pollinating insects in northern Germany: residues of clothianidin in pollen, nectar and honey
| Autor: | Daniel Rolke, Britta Peters, Guido Sterk, Wolfgang Blenau, Markus Persigehl |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Insecticides Plant Nectar Pollination Health Toxicology and Mutagenesis 010501 environmental sciences Management Monitoring Policy and Law Biology Toxicology medicine.disease_cause Seed treatment Guanidines 01 natural sciences Article Honey bees Neonicotinoids chemistry.chemical_compound ddc:590 Pollinator Germany Pollen medicine Animals Nectar Mason bees 0105 earth and related environmental sciences Brassica napus Pesticide Residues Clothianidin Residues Honey General Medicine Honey bee Bees Thiazoles 010602 entomology chemistry Agronomy Bee pollen Seeds Bumble bees Environmental Monitoring |
| Zdroj: | Ecotoxicology (London, England) |
| ISSN: | 1573-3017 0963-9292 |
| DOI: | 10.1007/s10646-016-1723-x |
| Popis: | This study was part of a large-scale monitoring project to assess the possible effects of Elado® (10 g clothianidin & 2 g β-cyfluthrin/kg seed)-dressed oilseed rape seeds on different pollinators in Northern Germany. Firstly, residues of clothianidin and its active metabolites thiazolylnitroguanidine and thiazolylmethylurea were measured in nectar and pollen from Elado®-dressed (test site, T) and undressed (reference site, R) oilseed rape collected by honey bees confined within tunnel tents. Clothianidin and its metabolites could not be detected or quantified in samples from R fields. Clothianidin concentrations in samples from T fields were 1.3 ± 0.9 μg/kg and 1.7 ± 0.9 μg/kg in nectar and pollen, respectively. Secondly, pollen and nectar for residue analyses were sampled from free flying honey bees, bumble bees and mason bees, placed at six study locations each in the R and T sites at the start of oilseed rape flowering. Honey samples were analysed from all honey bee colonies at the end of oilseed rape flowering. Neither clothianidin nor its metabolites were detectable or quantifiable in R site samples. Clothianidin concentrations in samples from the T site were below the limit of quantification (LOQ, 1.0 µg/kg) in most pollen and nectar samples collected by bees and 1.4 ± 0.5 µg/kg in honey taken from honey bee colonies. In summary, the study provides reliable semi-field and field data of clothianidin residues in nectar and pollen collected by different bee species in oilseed rape fields under common agricultural conditions. |
| Databáze: | OpenAIRE |
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