Comparing response of buff-tailed bumblebees and red mason bees to application of a thiacloprid-prochloraz mixture under semi-field conditions

Alkassab, Abdulrahim; Kunz, Nadine; Bischoff, Gabriela; Pistorius, Jens

doi:10.1007/s10646-020-02223-2

Cited by 12 publications

(13 citation statements)

References 35 publications

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“…In this study we used a red mason bee species, Osmia bicornis (Linnaeus, 1758), for monitoring the rates of exposure to pesticides from forage sources. This species has already been used for monitoring the rates of exposures to pesticide in oilseed rape fields [42,45,46,[56][57][58][59] and for laboratory testing of sublethal effects of insecticides on bee survival [41,47,48,60]. It is a food generalist, which feeds preferentially on pollen from oak (Quercus sp.…”

Section: Experimental Bee Speciesmentioning

confidence: 99%

“…This is worrisome because their functional interactions are not well known [79]. The synergistic increase in the toxicity of some pyrethroid and neonicotinoid insecticides in response to the presence of Ergosterol Biosynthesis Inhibitor (EBI) fungicides was documented in honeybees [80][81][82][83] and mason bees [46,[83][84][85].…”

Section: Rates Of Pesticide-contamination In Gardens Vs Orchardsmentioning

confidence: 99%

“…Three fungicides, including boscalid, were found to adversely affect the nesting behavior of the mason bees O. lignaria and Megachile rotundata [98]. Moreover, tebuconazole is an EBI fungicide, the class of fungicides known to synergistically enhance the toxicity of neonicotinoid insecticides [46,[80][81][82][83][84][85]. Four other EBI fungicides were detected in our study: propiconazole (93% prevalence; levels < LOQ), epoxiconazole (93% prevalence; levels < LOQ), prochloraz (36% prevalence; maximum level = 18.5 ppb), and metconazole (7% prevalence, i.e., only one record, with the concentration < LOQ).…”

Section: Implication For Bee Healthmentioning

confidence: 99%

“…Four other EBI fungicides were detected in our study: propiconazole (93% prevalence; levels < LOQ), epoxiconazole (93% prevalence; levels < LOQ), prochloraz (36% prevalence; maximum level = 18.5 ppb), and metconazole (7% prevalence, i.e., only one record, with the concentration < LOQ). Exposure to a tank mixture of the fungicide prochloraz and insecticide thiacloprid under semi-field conditions was evaluated to be highly risky for the red mason bee [46]. Propiconazole has been banned in the EU since March 2020 [99].…”

Section: Implication For Bee Healthmentioning

confidence: 99%

“…Risk assessment of acute exposure to pesticides used to be generally performed on honeybees [39]. The sublethal effects on the vitality of individuals, colonies or populations of wild bees resulting from longterm chronic exposures are examined less frequently and are, therefore, insufficiently understood [27,[40][41][42][43][44][45][46][47][48]. Pesticides are also applied in urban areas, but the risk of exposing pollinators to them has not been much investigated [18,49].…”

Section: Introductionmentioning

confidence: 99%

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Domestic Gardens Mitigate Risk of Exposure of Pollinators to Pesticides—An Urban-Rural Case Study Using a Red Mason Bee Species for Biomonitoring

Šlachta

Erban

Votavová³

et al. 2020

Sustainability

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Domestic gardens supply pollinators with valuable habitats, but the risk of exposure to pesticides has been little investigated. Artificial nesting shelters of a red mason bee species (Osmia bicornis) were placed in two suburban gardens and two commercial fruit orchards to determine the contamination of forage sources by pesticides. Larval pollen provisions were collected from a total of 14 nests. They consisted mainly of pollen from oaks (65–100% weight/sample), Brassicaceae (≤34% w/s) and fruit trees (≤1.6% w/s). Overall, 30 pesticides were detected and each sample contained a mixture of 11–21 pesticide residues. The pesticide residues were significantly lower in garden samples than in orchard samples. The difference was attributed mainly to the abundant fungicides pyrimethanil and boscalid, which were sprayed in fruit orchards and were present on average at 1004 ppb and 648 ppb in orchard samples, respectively. The results suggested that pollinators can benefit from domestic gardens by foraging from floral sources less contaminated by pesticides than in adjacent croplands.

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Section: Experimental Bee Speciesmentioning

confidence: 99%

Section: Rates Of Pesticide-contamination In Gardens Vs Orchardsmentioning

confidence: 99%

Section: Implication For Bee Healthmentioning

confidence: 99%

Section: Implication For Bee Healthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Domestic Gardens Mitigate Risk of Exposure of Pollinators to Pesticides—An Urban-Rural Case Study Using a Red Mason Bee Species for Biomonitoring

Šlachta

Erban

Votavová³

et al. 2020

Sustainability

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Toxicities of Neonicotinoid‐Containing Pesticide Mixtures on Nontarget Organisms

Zhao

Yang

et al. 2020

Enviro Toxic and Chemistry

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Neonicotinoids are a widely used class of pesticides. Co-exposure to neonicotinoids and other classes of pesticides can exert potentiating or synergistic effects, and these mixtures have been detected in human bodily fluids. The present review summarizes studies into the effects of neonicotinoid-containing pesticide mixtures on humans and other nontarget organisms. Exposure to these mixtures has been reported to result in reproductive and hormonal toxicity, genotoxicity, neurotoxicity, hepatotoxicity, and immunotoxicity in vertebrates. Mortality of pollinators and toxicity in other organisms has also been reported. The underlying mechanism of pesticide mixture toxicity may be associated with impairment of cytochrome 450 enzymes, which are involved in metabolizing pesticides. However, a comprehensive explanation of the adverse effects of neonicotinoid-containing pesticide mixtures is still required so that effective prevention and control measures can be formulated.

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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

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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.

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Comparing response of buff-tailed bumblebees and red mason bees to application of a thiacloprid-prochloraz mixture under semi-field conditions

Cited by 12 publications

References 35 publications

Domestic Gardens Mitigate Risk of Exposure of Pollinators to Pesticides—An Urban-Rural Case Study Using a Red Mason Bee Species for Biomonitoring

Domestic Gardens Mitigate Risk of Exposure of Pollinators to Pesticides—An Urban-Rural Case Study Using a Red Mason Bee Species for Biomonitoring

Toxicities of Neonicotinoid‐Containing Pesticide Mixtures on Nontarget Organisms

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

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