Is there a risk to honeybees from use of thiamethoxam as a sugar beet seed treatment?

Thompson, Helen; Vaughan, Sarah; Mahlein, Anne-Katrin; Ladewig, Erwin; Kenter, Christine

doi:10.1002/ieam.4498

Cited by 9 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This confirms the results of a semi‐field study by Alkassab et al (2020), under more realistic conditions, and makes this exposure route potentially relevant for risk assessment. Thompson, Vaughan, et al (2021) detected 0.008 mg/kg TMX + CLO in German soils 1 year after sugar beet growing. This confirms the exposure level of 0.001 mg/kg in our study, taking into account dilution effects due to the collecting behavior of Osmia bees.…”

Section: Discussionmentioning

confidence: 99%

“…To jointly account for TMX and CLO residues, we followed the approach of Thompson, Vaughan, et al (2021). The toxicity and the molar mass of TMX and CLO are very similar (EFSA, 2018b(EFSA, , 2018cThompson, Vaughan, et al, 2021;USEPA, 2020), and therefore the residues of each compound were summarized. This provides a total residue of TMX + CLO/ sample.…”

Section: Residue Analysismentioning

confidence: 99%

“…Because sugar beet is usually harvested before flowering, the most likely route of exposure is adjacent weeds or succeeding crops that take up the active ingredient from the soil and release it to flower visitors. A recent study analyzed CLO + TMX residues in pollen and nectar samples from succeeding crops planted directly at the site where treated sugarbeet had been grown in the previous season (Thompson, Vaughan, et al, 2021). Detections were at or below the limit of quantitation (0.5–1 µg a.i./kg) at eight sites in five countries.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential Risk of Residues From Neonicotinoid‐Treated Sugar Beet in Flowering Weeds to Honey Bees (Apis mellifera L.)

Odemer

Friedrich

Illies

et al. 2023

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

In 2018 the European Union (EU) banned the three neonicotinoid insecticides imidacloprid, clothianidin (CLO), and thiamethoxam (TMX), but they can still be used if an EU Member State issues an emergency approval. Such an approval went into effect in 2021 for TMX-coated sugar beet seeds in Germany. Usually, this crop is harvested before flowering without exposing non-target organisms to the active ingredient or its metabolites. In addition to the approval, strict mitigation measures were imposed by the EU and the German federal states. One of the measures was to monitor the drilling of sugar beet and its impact on the environment. Hence we took residue samples from different bee and plant matrices and at different dates to fully map beet growth in the German states of Lower Saxony, Bavaria, and Baden-Württemberg. A total of four treated and three untreated plots were surveyed, resulting in 189 samples. Residue data were evaluated using the US Environmental Protection Agency BeeREX model to assess acute and chronic risk to honey bees from the samples, because oral toxicity data are widely available for both TMX and CLO. Within treated plots, we found no residues either in pools of nectar and honey crop samples (n = 24) or dead bee samples (n = 21). Although 13% of beebread and pollen samples and 88% of weed and sugar beet shoot samples were positive, the BeeREX model found no evidence of acute or chronic risk. We also detected neonicotinoid residues in the nesting material of the solitary bee Osmia bicornis, probably from contaminated soil of a treated plot. All control plots were free of residues. Currently, there are insufficient data on wild bee species to allow for an individual risk assessment. In terms of the future use of these highly potent insecticides, therefore, it must be ensured that all regulatory requirements are complied with to mitigate any unintentional exposure.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Residue Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Potential Risk of Residues From Neonicotinoid‐Treated Sugar Beet in Flowering Weeds to Honey Bees (Apis mellifera L.)

Odemer

Friedrich

Illies

et al. 2023

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…Thus, host resistance in commercial sugar beet production has to be supplemented by neonicotinoid seed treatments that control the BLH vector. However, the use of neonicotinoid insecticides may be restricted in the future because of environmental concerns [ 11 , 12 ]. So, there is an urgent need to explore other factors that improve host plant resistance against BCTV in a more environmentally friendly manner.…”

Section: Introductionmentioning

confidence: 99%

Leaf Bacteriome in Sugar Beet Shows Differential Response against Beet curly top virus during Resistant and Susceptible Interactions

Majumdar

Strausbaugh

Vincill

et al. 2022

IJMS

View full text Add to dashboard Cite

Beet curly top virus (BCTV) significantly reduces sugar beet yield in semi-arid production areas. Genetic resistance to BCTV is limited; therefore, identification of additional resistance-associated factors is highly desired. Using 16S rRNA sequencing and BCTV resistant (R) genotypes (KDH13, KDH4-9) along with a susceptible (S) genotype (KDH19-17), we investigated leaf bacteriome changes during BCTV post inoculation (pi). At day 6 (~6-week-old plants), Cyanobacteria were predominant (~90%); whereas, at week 4 (~10-week-old plants) Firmicutes (11–66%), Bacteroidetes (17–26%), and Verrucomicrobia (12–29%) were predominant phyla and genotype dependent. Both Bacteroidetes and Verrucomicrobia, increased post infection only in the R lines. The bacterial genera Brevibacillus increased at 6 dpi, and Akkermansia and Bacteroides at 4 wkpi in the R lines. Linear discriminant analysis effect size (LEfSe) identified potential biomarkers in the R vs. S lines. Functional profiling revealed bacterial enrichment associated with the TCA cycle, polyisoprenoid, and L-methionine biosynthesis pathways only in KDH4-9 at 6 dpi. At 4 wkpi, bacteria associated with tryptophan and palmitate biosynthesis in the R lines, and uridine monophosphate, phosphatidyl glycerol, and phospholipid biosynthesis in the S line, were enriched. Future characterization of bacterial genera with antiviral properties will help establish their use as biocontrol agents/biomarkers against BCTV.

show abstract

“…It varies tremendously in quality depending on different locations [4]. Most times kinds of honey contain contaminants such as agrochemicals, charcoal, plant part, or adulteration with sugar molasses or starch [5,6].…”

Section: Introductionmentioning

confidence: 99%

Mycotoxin Profile of Honey and Dry-Cured Meat (Kilishi) for Export in Abuja, Nigeria

Anjorin

Ekwunife²,

Egweye³

et al. 2022

Food Science and Engineering

View full text Add to dashboard Cite

Animal products are not immune to contaminants and could render them not safe for local consumption or unacceptable for export. This study aimed to ascertain the prevalence and profile of Aflatoxins (AFs), Ochratoxins (OTs) and Fumonisins (FBs) contamination in honey and dry-cured meat (kilishi) intended for export in the Federal Capital Territory (FCT) of Nigeria. Ninety (90) samples of each animal product were collected and analyzed. Mycotoxins were determined using High-Performance Liquid Chromatography (HPLC) quantitative techniques. According to the investigation, none of the honey samples for export from the FCT Abuja was positive for Aflatoxin B1 (AFB1) and Aflatoxin B2 (AFB2) contaminants. The occurrence of Ochratoxin A (OTA) was most prevalent in the samples of honey from Abuja East, but with the greatest average concentration (62.87 μg/Kg) in the samples from Abuja South. In samples from the Abuja South zone, the prevalence of AFB1 and AFB2 in the kilishi was relatively high (73.33% and 66.67% respectively). Also, OTA and Ochratoxin B (OTB) were detected at varying levels in the cured meat. Dry-cured meat sold in Abuja Nigeria to consumers and for export is found not safe due to Aflatoxin B1 and B2, OTA and OTB contamination level which was above the EU maximum limit. The regulatory bodies in the country should always carry out routine monitoring to guarantee that marketed products from animals are consumable and also exportable.

show abstract

Is there a risk to honeybees from use of thiamethoxam as a sugar beet seed treatment?

Cited by 9 publications

References 52 publications

Potential Risk of Residues From Neonicotinoid‐Treated Sugar Beet in Flowering Weeds to Honey Bees (Apis mellifera L.)

Potential Risk of Residues From Neonicotinoid‐Treated Sugar Beet in Flowering Weeds to Honey Bees (Apis mellifera L.)

Leaf Bacteriome in Sugar Beet Shows Differential Response against Beet curly top virus during Resistant and Susceptible Interactions

Mycotoxin Profile of Honey and Dry-Cured Meat (Kilishi) for Export in Abuja, Nigeria

Contact Info

Product

Resources

About