A three-year large scale study on the risk of honey bee colony exposure to blooming sunflowers grown from seeds treated with thiamethoxam and clothianidin neonicotinoids

Flores, José Manuel; Gámiz, Victoria; Gil-Lebrero, Sergio; Rodríguez, Inmaculada; Navas, Francisco Javier; García-Valcárcel, Ana I.; Cutillas, Víctor; Fernández‐Alba, Amadeo R.; Hernando, María Dolores

doi:10.1016/j.chemosphere.2020.127735

Cited by 13 publications

(8 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recent studies [41,42] present research carried out for 3 years, regarding the risk to which bees (Apis mellifera) are exposed in a sunflower crop, the seeds being treated with thiamethoxam and clothianidin. The studies were carried out with 180 bee colonies, the health and development of the colonies being evaluated by monitoring the adult population, the development of the brood, the state of the queen, the food reserve and the percentage of survival.…”

Section: Resultsmentioning

confidence: 99%

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Zaharia

Trotuş²,

Trașcă

et al. 2023

Agriculture

View full text Add to dashboard Cite

This paper presents studies performed for the monitoring of imidacloprid, clothianidin and thiamethoxam residues applied as seed treatment in rapeseed (Brassica napus ssp. oleifera), maize (Zea mays) and sunflower crops (Helianthus annuus). The experiments were located in representative areas of the mentioned crops. Residue levels were determined in plant samples at different phenological development stages, including flowers, as well as in bees and hive products (pollen, honeycomb, honey) by liquid chromatography/tandem mass spectroscopy (LC-MS/MS). The analyses were performed in ISO 17025-accredited laboratories, referring to the limit of quantification (LOQ), characteristic of the method used to determine the residues. In 2019, the percentage of samples that contained residues of the three substances, applied to the seed, was 16.39%, representing 20 samples out of the total of 122 analyzed samples. In 2020, 10 samples contained neonicotinoid residues above the LOQ, including 5 soil samples and 5 plant samples, representing 6.17% of the total samples. In 2021, from 149 samples with neonicotinoid applied as seed treatment, residues were identified in 12 soil samples and 11 plant samples, representing 15.43% of the total number of samples. In 2022, only 12 soil samples and 1 pasture sample contained residues above the LOQ. The results show that the highest percentage of samples with residues above the LOQ was recorded by the soil samples, while the flower and bee samples had the lowest percentages of samples with residues above the LOQ; no residues of the three neonicotinoid substances were identified in the honey samples.

show abstract

Section: Resultsmentioning

confidence: 99%

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Zaharia

Trotuş²,

Trașcă

et al. 2023

Agriculture

View full text Add to dashboard Cite

show abstract

“…With the parametrisation used in Section 7.1, this study design should be able to detect as significant effects close to 11%. The study was further prolonged for 3 years as reported by Flores et al (2021). In addition, the experimental set-up was enlarged by making use of 10 fields per group and six hives per field.…”

Section: Preliminary Estimation Of the Requirement For Higher Tier Studiesmentioning

confidence: 99%

Analysis of background variability of honey bee colony size

Ippolito¹,

Focks²,

Rundlöf³

et al. 2021

EFS3

View full text Add to dashboard Cite

In the context of the definition of specific protection goals for bees, risk managers asked EFSA to provide scientific background to support them in their decision‐making process about what needs to be protected and to what extent. The risk managers indicated that the derivation of a threshold of acceptable effects on colony size based on their variability was the preferred option for honey bees. This approach assumes that when evaluating a pesticide, the magnitude of acceptable effects should be set within the range of the background variability of colonies not exposed to pesticides. In this report EFSA used the BEEHAVE model to assess background variability of colony size in 19 EU environmental scenarios covering a range of geographical, climatic and beekeeping conditions. A comparison was made between the model outcome and the measurements performed on control groups of experimental field studies. The analysis of the background variability presented in this document should support risk managers in defining a threshold for colony size reduction that is considered acceptable.

show abstract

“…11 In addition to these, bees. [12][13][14] In general, these negative effects presented were gene mutations, carcinogenic alterations, disorientation and, principally, death of nontarget insects such as honeybees.…”

Section: Introductionmentioning

confidence: 99%

Development of an electrochemical sensor based on ternary oxide SiO₂/Al₂O₃/SnO₂ modified with carbon black for direct determination of clothianidin in environmental and food samples

et al. 2023

View full text Add to dashboard Cite

show abstract

A three-year large scale study on the risk of honey bee colony exposure to blooming sunflowers grown from seeds treated with thiamethoxam and clothianidin neonicotinoids

Cited by 13 publications

References 32 publications

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Analysis of background variability of honey bee colony size

Development of an electrochemical sensor based on ternary oxide SiO₂/Al₂O₃/SnO₂ modified with carbon black for direct determination of clothianidin in environmental and food samples

Contact Info

Product

Resources

About

A three-year large scale study on the risk of honey bee colony exposure to blooming sunflowers grown from seeds treated with thiamethoxam and clothianidin neonicotinoids

Cited by 13 publications

References 32 publications

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Analysis of background variability of honey bee colony size

Development of an electrochemical sensor based on ternary oxide SiO2/Al2O3/SnO2 modified with carbon black for direct determination of clothianidin in environmental and food samples

Contact Info

Product

Resources

About

Development of an electrochemical sensor based on ternary oxide SiO₂/Al₂O₃/SnO₂ modified with carbon black for direct determination of clothianidin in environmental and food samples