Distributions of imidacloprid, imidacloprid‐olefin and imidacloprid‐urea in green plant tissues and roots of rapeseed (<i>Brassica napus</i>) from artificially contaminated potting soil

Seifrtova, Marcela; Halešová, Taťána; Sulcova, Klara; Riddellová, Kateřina; Erban, Tomáš

doi:10.1002/ps.4418

Cited by 39 publications

(16 citation statements)

References 36 publications

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“…In a previous study, we investigated the distribution of imidacloprid and its two metabolites in rapeseed originating from the artificial contamination of soil substrate. 55 In that study, all the compounds were observed in green plant tissues, whereas only imidacloprid-urea and very small amounts of imidacloprid-olefin were observed in the soil after relatively high imidacloprid treatment. 55 Thus, we suggest that the imidacloprid-urea in the bees in our study originated from historical contamination of the site with imidacloprid, which was present in the soil and had already metabolized to imidacloprid-urea.…”

Section: Neonicotinoids: Detection Of Thiamethoxam and Imidacloprid-umentioning

confidence: 71%

“…The presence of imidacloprid‐urea in the bees in the absence of the parent compound and the olefinic metabolite suggests that the bees came into direct environmental contact with imidacloprid‐urea and delivered only the metabolite to the colony. In a previous study, we investigated the distribution of imidacloprid and its two metabolites in rapeseed originating from the artificial contamination of soil substrate . In that study, all the compounds were observed in green plant tissues, whereas only imidacloprid‐urea and very small amounts of imidacloprid‐olefin were observed in the soil after relatively high imidacloprid treatment .…”

Section: Resultsmentioning

confidence: 99%

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tau‐Fluvalinate and other pesticide residues in honey bees before overwintering

Erban

Václavíková

Tomesova

et al. 2019

Pest Management Science

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BACKGROUND Pesticides have often been linked to honey bee colony losses, which occur mainly over winter. In this study, we investigated residues in nine colonies at a model agricultural research site during the period before wintering. Moreover, we applied the acaricide tau‐fluvalinate to the colonies via a strip formulation. The pesticide content was determined by UHPLC‐QqQ‐MS/MS in bees from brood comb initially collected in mid‐September immediately prior to the start of tau‐fluvalinate treatment and 30 later at the time of tau‐fluvalinate strip removal. RESULTS In addition to commonly analyzed pesticides, we detected two plant growth regulators, chlormequat and metazachlor, in the bee colonies. Whereas thiacloprid, chlormequat and acetamiprid decreased after 30 days and contributed considerably to differences between sample time points, other pesticides appeared to be rather stable. Interestingly, we identified diazinon, which has been banned in the European Union since 2007. The residues of methiocarb sulfoxide and imidacloprid‐urea in the absence of their parent compounds indicate historical environmental contamination that can be identified by the detection of residues in a bee colony. tau‐Fluvalinate was detected only after the 30‐day treatment at an average (± SD) concentration of 1.29 ± 1.93 ng/bee, ranging from 0.06 to 7.13 ng/bee. CONCLUSION The multidimensional behavior of pesticides in a bee colony was indicated. Although the research area is used for agriculture, the measured pesticide level was relatively low. The recorded concentrations of tau‐fluvalinate should not be dangerous to bees, as the values were ∼ 200–5000‐fold lower than the reported median lethal dose (LD50) values. © 2019 Society of Chemical Industry

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Section: Neonicotinoids: Detection Of Thiamethoxam and Imidacloprid-umentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

tau‐Fluvalinate and other pesticide residues in honey bees before overwintering

Erban

Václavíková

Tomesova

et al. 2019

Pest Management Science

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“…This results in toxicity causing colony collapse disorder to the not-target insects which are mainly pollinators like honey bees ( Tapparo et al, 2012 ; Whitehorn et al, 2012 ). IMI is considered as one of the most toxic insecticide which badly affects the bee population ( Seifrtova et al, 2017 ). Residues of IMI may enter into the soil and water ecosystem indirectly through leaf fall or directly via off-site leaching, and their persistence is more in those soils which are deficit in organic matter or containing high percentage of clay ( Felsot et al, 1998 ; Wilkins, 2000 ; Smelt et al, 2003 ).…”

Section: Introductionmentioning

confidence: 99%

Jasmonic Acid Seed Treatment Stimulates Insecticide Detoxification in Brassica juncea L.

et al. 2018

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The present study focused on assessing the effects of jasmonic acid (JA) seed treatment on the physiology of Brassica juncea seedlings grown under imidacloprid (IMI) toxicity. It has been observed that IMI application declined the chlorophyll content and growth of seedlings. However, JA seed treatment resulted in the significant recovery of chlorophyll content and seedling growth. Contents of oxidative stress markers like superoxide anion, hydrogen peroxide, and malondialdehyde were enhanced with IMI application, but JA seed treatment significantly reduced their contents. Antioxidative defense system was activated with IMI application which was further triggered after JA seed treatment. Activities of antioxidative enzymes and contents of non-enzymatic antioxidants were enhanced with the application of IMI as well as JA seed treatment. JA seed treatment also regulated the gene expression of various enzymes under IMI stress. These enzymes included respiratory burst oxidase (RBO), Ribulose-1,5-bisphosphate carboxylase/oxygenase (RUBISCO), NADH-ubiquinone oxidoreductase (NADH), carboxylesterase (CXE), chlorophyllase (CHLASE), cytochrome P450 monooxygenase (P450). JA seed treatment up-regulated the expressions of RUBISCO, NADH, CXE, and P450 under IMI toxicity. However, expressions of RBO and CHLASE were down-regulated in seedlings germinated from JA seed treatment and grown in presence of IMI. Seed soaking with JA also resulted in a significant reduction of IMI residues in B. juncea seedlings. The present study concluded that seed soaking with JA could efficiently reduce the IMI toxicity by triggering the IMI detoxification system in intact plants.

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“…Therefore residual IMI and its influence in the environment are also attracting more and more attention . There are an increasing number of reports on IMI residues which show that IMI not only has residues in crop roots and plants but also migrates to crop fruits …”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4][5] There are an increasing number of reports on IMI residues which show that IMI not only has residues in crop roots and plants but also migrates to crop fruits. [6][7][8][9] The environmental behavior of IMI metabolites in soils, animals and plants has been researched extensively, but there has been no comprehensive study on the forced metabolic mechanism of IMI. Summarizing various research studies, the metabolic pathway of IMI can be summed up in four ways [10][11][12][13][14][15][16] (i) denitrification directly generates guanidine IMI, which is then further oxidized to carbonyl IMI (urea IMI); (ii) reducing nitro to nitroso derivatives, nitroso into guanidyl IMI; (iii) oxidizing imidazolidine rings, forming 5-OH IMI, 4-OH IMI or 4,5-dihydroxyl IMI (4,5-diOH IMI), then dehydration into olefin IMI; (iv) IMI forms different conjugates with coexisting small molecules (amino acids, maltose, glucose, succinic acid, etc.)…”

Section: Introductionmentioning

confidence: 99%

Determination of imidacloprid and its relevant metabolites in tomato using modified QuEChERS combined with ultrahigh‐pressure liquid chromatography/Orbitrap tandem mass spectrometry

Jiang

2019

J Sci Food Agric

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BACKGROUND Red tomato processing is one of the leading industries in Xinjiang, but also the largest export industry. In the process of tomato planting, imidacloprid (IMI) is often used to kill aphids, which poses the risk of pesticide residue. However, as daily consumables, pesticide residue on tomatoes may cause a potential threat to human health. Therefore the aims of this research were to study the residue dynamics of IMI pesticides in tomatoes by monitoring field experiments and to investigate the fate of IMI and its metabolites under Xinjiang field conditions. RESULTS In the field trials, three different doses of IMI were sprayed on tomato during the fruit setting stage. Degradation of IMI and residue behaviors of its metabolites at different stages were systemically traced and evaluated by ultrahigh‐performance liquid chromatography coupled with tandem mass spectrometry (UHPLC/Q‐Orbitrap MS). An accurate mass tool was used as the main method to identify the IMI metabolites. The improved method showed high efficiency in detecting IMI and 6‐chlorinated nicotinic acid (6‐CNA), being able to determine hazardous pesticides at trace levels. The fate of IMI in field tomato was investigated over 28 days. The metabolic mechanism of IMI in tomato is: OH products in the early stage and carbonyl products in the late stage. CONCLUSION Under natural conditions, pesticides in tomatoes will gradually decrease with time. In this process, olefin IMI is produced, but it is almost completely metabolized after 28 days. Therefore even 10 times the recommended dose of IMI pesticide will not endanger human health. © 2019 Society of Chemical Industry

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Distributions of imidacloprid, imidacloprid‐olefin and imidacloprid‐urea in green plant tissues and roots of rapeseed (Brassica napus) from artificially contaminated potting soil

Cited by 39 publications

References 36 publications

tau‐Fluvalinate and other pesticide residues in honey bees before overwintering

tau‐Fluvalinate and other pesticide residues in honey bees before overwintering

Jasmonic Acid Seed Treatment Stimulates Insecticide Detoxification in Brassica juncea L.

Determination of imidacloprid and its relevant metabolites in tomato using modified QuEChERS combined with ultrahigh‐pressure liquid chromatography/Orbitrap tandem mass spectrometry

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