Investigations on the oxalic acid content of honey from oxalic acid treated and untreated bee colonies

Moosbeckhofer, Rudolf; Pechhacker, Hermann; Unterweger, Heidrun; Bandion, F.; Heinrich-Lenz, Andreas

doi:10.1007/s00217-003-0698-z

Cited by 12 publications

(2 citation statements)

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“…Honeybees are also frequently exposed to acidic acaricides that are used to treat parasitic Varroa mite infestations (Sammataro et al, 2008). Oxalic acid is the most widely used acidic acaricide (Nanetti et al, 2003;Brodschneider et al, 2019) and although its mode of action remains unknown, it is presumed to be safe for bees as it is naturally found in honey (Bogdanov et al, 2002;Moosbeckhofer et al, 2003). Honeybees tolerate treatment concentrations of 3.5% (Rademacher and Harz, 2006), but exposure to higher concentrations can increase mortality and induce behavioral changes, such as reduced nursing efforts or general inactivity (Schneider et al, 2012;Rademacher et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Resistance and Vulnerability of Honeybee (Apis mellifera) Gut Bacteria to Commonly Used Pesticides

et al. 2021

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Agricultural and apicultural practices expose honeybees to a range of pesticides that have the potential to negatively affect their physiology, neurobiology, and behavior. Accumulating evidence suggests that these effects extend to the honeybee gut microbiome, which serves important functions for honeybee health. Here we test the potential effects of the pesticides thiacloprid, acetamiprid, and oxalic acid on the gut microbiota of honeybees, first in direct in vitro inhibition assays and secondly in an in vivo caged bee experiment to test if exposure leads to gut microbiota community changes. We found that thiacloprid did not inhibit the honeybee core gut bacteria in vitro, nor did it affect overall community composition or richness in vivo. Acetamiprid did also not inhibit bacterial growth in vitro, but it did affect community structure within bees. The eight bacterial genera tested showed variable levels of susceptibility to oxalic acid in vitro. In vivo, treatment with this pesticide reduced amplicon sequence variant (ASV) richness and affected gut microbiome composition, with most marked impact on the common crop bacteria Lactobacillus kunkeei and the genus Bombella. We conducted network analyses which captured known associations between bacterial members and illustrated the sensitivity of the microbiome to environmental stressors. Our findings point to risks of honeybee exposure to oxalic acid, which has been deemed safe for use in treatment against Varroa mites in honeybee colonies, and we advocate for more extensive assessment of the long-term effects that it may have on honeybee health.

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Section: Introductionmentioning

confidence: 99%

Resistance and Vulnerability of Honeybee (Apis mellifera) Gut Bacteria to Commonly Used Pesticides

et al. 2021

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“…Subsequent studies indicated the potential of the method [17–22], which has been applied with better results during the broodless period. Application of the method does not increase the amount of oxalic acid in honey [23–25] and has no toxic effects on bees. However, later studies indicated that the utilization of oxalic acid by either trickling or spraying has a detrimental effect on brood development when open brood is present, and is therefore not as safe as it has been assessed in the past [26–27].…”

Section: Introductionmentioning

confidence: 99%

Use of costic acid, a natural extract from Dittrichia viscosa, for the control of Varroa destructor, a parasite of the European honey bee

Sofou

Isaakidis

Spyros

et al. 2017

Beilstein J. Org. Chem.

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Costic acid has been isolated from the plant Dittrichia viscosa and its efficacy against Varroa destructor, a parasite of Apis mellifera, the European honey bee, has been studied. Costic acid exhibited potent in vivo acaricidal activity against the parasite. Initial experiments showed that the compound is not toxic for human umbilical vein endothelial cells (HUVEC) at concentrations of up to 230 micromolar (μM), indicating that costic acid could be used as a safe, low-cost and efficient agent for controlling varroosis in honey bee colonies.

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Contaminants of bee products

2005

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-Bee products can be contaminated from different sources. The contamination can arise from beekeeping practices or from the environment. Environmental contaminants are covered in the first part of the review. They are: the heavy metals lead, cadmium and mercury, radioactive isotopes, organic pollutants, pesticides (insecticides, fungicides, herbicides and bactericides), pathogenic bacteria and genetically modified organisms. The second part of the review discusses contaminants from beekeeping. The main ones are acaricides: lipophylic synthetic compounds and non-toxic substances such as organic acids and components of essential oils; and antibiotics used for the control of bee brood diseases, mainly tetracyclines, streptomycine, sulfonamides and chloramphenicol. Other substances used in beekeeping play a minor role: para-dichlorobenzene, used for the control of wax moth and chemical repellents. The degree of contamination of honey, pollen, beeswax, propolis and royal jelly by the different contaminants is reviewed. Honey / beeswax / propolis / royal jelly / contamination / residues

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Investigations on the oxalic acid content of honey from oxalic acid treated and untreated bee colonies

Cited by 12 publications

References 1 publication

Resistance and Vulnerability of Honeybee (Apis mellifera) Gut Bacteria to Commonly Used Pesticides

Resistance and Vulnerability of Honeybee (Apis mellifera) Gut Bacteria to Commonly Used Pesticides

Use of costic acid, a natural extract from Dittrichia viscosa, for the control of Varroa destructor, a parasite of the European honey bee

Contaminants of bee products

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