The Environmental Fate and Ecotoxicity of Glyphosate

Blake, Robin; Pallett, Ken

doi:10.1564/v29_dec_08

Cited by 27 publications

(20 citation statements)

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“…Degradation strongly correlated with the soil exchangeable acidity (H þ and Al 3þ ), exchangeable Ca 3þ ions, and ammonium lactate-extractable potassium. Blake and Pallett (2018) state that the average half-life of glyphosate in soil is about 30 d, with a range of 5.7 to 40.9 d.…”

Section: Biological Processesmentioning

confidence: 99%

“…Previous reviews have covered the environmental fate (e.g., Borggaard and Gimsing 2008) and, to a lesser degree, the environmental and ecological impacts of glyphosate (e.g., Cerdeira and Duke 2006;Giesy et al 2000). An excellent, short, up-to-date discussion of this topic is the recent review by Blake and Pallett (2018). Thus, I will not repeat much of what is in these reviews in detail, but will instead try to distill the main findings of these publications and update what is known from more recent research results.…”

Section: Introductionmentioning

confidence: 99%

“…This is germane, in that most GE crops are GR crops, and GR crops contain glyphosate residues that are generally below the levels permitted (e.g., Duke et al 2003). Blake and Pallett (2018) review the acute toxicity of glyphosate to a range of aquatic and terrestrial organisms and conclude that, at exposures that are expected in nature, the likely effects are minimal to nil.…”

Section: Introductionmentioning

confidence: 99%

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Glyphosate: environmental fate and impact

Duke

2020

Weed Sci

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Glyphosate is the most used herbicide worldwide, which has contributed to concerns about its environmental impact. Compared with most other herbicides, glyphosate has a half-life in soil and water that is relatively short (averaging about 30 d in temperate climates), mostly due to microbial degradation. Its primary microbial product, aminomethylphosphonic acid, is slightly more persistent than glyphosate. In soil, glyphosate is virtually biologically inactive due to its strong binding to soil components. Glyphosate does not bioaccumulate in organisms, largely due to its high water solubility. Glyphosate-resistant crops have greatly facilitated reduced-tillage agriculture, thereby reducing soil loss, soil compaction, carbon dioxide emissions, and fossil fuel use. Agricultural economists have projected that loss of glyphosate would result in increased cropping area, some gained by deforestation, and an increase in environmental impact quotient of weed management. Some drift doses of glyphosate to non-target plants can cause increased plant growth (hormesis) and/or increased susceptibility to plant pathogens, although these non-target effects are not well documented. The preponderance of evidence confirms that glyphosate does not harm plants by interfering with mineral nutrition and that it has no agriculturally significant effects on soil microbiota. Glyphosate has a lower environmental impact quotient than most synthetic herbicide alternatives.

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Section: Biological Processesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Glyphosate: environmental fate and impact

Duke

2020

Weed Sci

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“…Even though solid bond to the soil amount of GLY which leach or runoff to surfaceor ground-waters is low [40], spray drift from the ground and aerial applications of glyphosate may enter to aquatic ecosystems [41]. Hight application rates, rainfall, and a flow route that does not include transportation of GLY through the soil from watersheds comprise the most risk for offsite transport of GLY [9].…”

Section: Environmental Fatementioning

confidence: 99%

“…This herbicide is unique for its high efficiency, transformation on major metabolite AMPA due to microbial degradation [16,40], and physiochemical properties: water solubility 11.6 g/L at 25°C, low lipophilicity LogP <-3.2 at 20°C, dissociation constant of 2.3 at 25°C [40]. Under aerobic conditions, the half-life of GLY ranges from 1.8 to 109 days in soil and 14-518 days in water-sediment systems; however, in anaerobic water-sediment systems ranges from 199 to 208 days [15].…”

Section: Environmental Fatementioning

confidence: 99%

Effects of Glyphosate and Their Metabolite AMPA on Aquatic Organisms

Tresnakova¹,

Stará²,

Velíšek³

2021

Preprint

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Glyphosate (N-(phosphonomethyl)glycine) is a herbicide used to kill broadleaf weeds and grass, developed in the early 1970s. The widely occurring degradation product aminomethylphosphonic acid (AMPA) is a result of glyphosate and amino-polyphosphonate degradation. The massive use of the parent compounds leads to the ubiquity of AMPA in the environment, and particularly in water. Considering this, it can be assumed that glyphosate and its major metabolites could pose a potential risk to aquatic organisms. This review summarises current knowledge about residual glyphosate and their major metabolite AMPA in the aquatic environment, including status and toxic effects in aquatic organisms, mainly fish, are reviewed. Based on the above, we identify major gaps in the current knowledge and some directions for future research knowledge about the effects of worldwide use of herbicide glyphosate and its major metabolite AMPA. The toxic effect of glyphosate and their major metabolite AMPA has mainly influenced growth, early development, oxidative stress biomarkers, antioxidant enzymes, haematological, biochemical plasma indices, caused histopathological changes in the aquatic organism.

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Visible‐Light Mediated Photooxidative Phosphorylation of Benzylamines: A Novel and Mild Pathway Towards α‐Aminophosphorus Compounds

Ung

Perepichka

2021

Helvetica Chimica Acta

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Dedicated to Prof. E. Peter Kündig on his 75th birthdayTraditional syntheses of α-aminophosphorus therapeutic targets proceed through the hydrophosphorylation of C=N or C=O bonds, thus necessitating preliminary oxidized substrates. Cross-dehydrogenative coupling strategies can bypass this extra oxidation step by oxidizing simpler substrates in situ before phosphorylating them, but those protocols can suffer from the use of toxic stoichiometric oxidants. Photochemical strategies can access those oxidized intermediates without any harsh conditions and can use molecular oxygen as a benign and sustainable oxidant. We report herein a simple protocol using visible light, phosphinylidenes and benzylamine derivatives for the synthesis of α-aminophosphorus products under aerobic conditions and using an iridium photosensitizer.

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The Environmental Fate and Ecotoxicity of Glyphosate

Cited by 27 publications

References 0 publications

Glyphosate: environmental fate and impact

Glyphosate: environmental fate and impact

Effects of Glyphosate and Their Metabolite AMPA on Aquatic Organisms

Visible‐Light Mediated Photooxidative Phosphorylation of Benzylamines: A Novel and Mild Pathway Towards α‐Aminophosphorus Compounds

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