Degradation of Glyphosate in Excised Leaves of Tobacco and Sugar Beet

Stock, M.; Hieke, M.; Weidhase, R; Schütte, H. R.

doi:10.1016/s0176-1617(11)80603-6

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Until the 1990s, a generally held belief was that glyphosate is not metabolised by crops to which it is phytotoxic, whereas the metabolism of glyphosate to AMPA by soil microorganisms was well described by that time. Several scientific reports in the early 1990s showed that AMPA was formed from glyphosate as its main metabolite in sterilised cultures of crop cells or tissues, ruling out a possible contribution of microbiological activity 58, 59. Moreover, a group of Canadian authors showed that AMPA occurred in a range of experimentally field‐grown conventional, non‐GM crops to which glyphosate had been applied as a preharvest application, including barley, brassica (canola), crested wheatgrass, field pea and wheat.…”

Section: Herbicide‐resistant Cropsmentioning

confidence: 99%

The impact of altered herbicide residues in transgenic herbicide‐resistant crops on standard setting for herbicide residues

Kleter¹,

Unsworth²,

Harris³

2011

Pest Management Science

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The global area covered with transgenic (genetically modified) crops has rapidly increased since their introduction in the mid-1990s. Most of these crops have been rendered herbicide resistant, for which it can be envisaged that the modification has an impact on the profile and level of herbicide residues within these crops. In this article, the four main categories of herbicide resistance, including resistance to acetolactate-synthase inhibitors, bromoxynil, glufosinate and glyphosate, are reviewed. The topics considered are the molecular mechanism underlying the herbicide resistance, the nature and levels of the residues formed and their impact on the residue definition and maximum residue limits (MRLs) defined by the Codex Alimentarius Commission and national authorities. No general conclusions can be drawn concerning the nature and level of residues, which has to be done on a case-by-case basis. International residue definitions and MRLs are still lacking for some herbicide-crop combinations, and harmonisation is therefore recommended.

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Section: Herbicide‐resistant Cropsmentioning

confidence: 99%

The impact of altered herbicide residues in transgenic herbicide‐resistant crops on standard setting for herbicide residues

Kleter¹,

Unsworth²,

Harris³

2011

Pest Management Science

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“…Decarboxylation has been identified as a major route of metabolism (Coupland 1984;Stock et Glyphosate was not applied at crop development stage 4 because the crop was already desiccated.…”

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confidence: 99%

Residues of glyphosate and its metabolite AMPA in field pea, barley and flax seed following preharvest applications

Cessna¹,

Darwent²,

Townley-Smith³

et al. 2002

Can. J. Plant Sci.

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. 2002. Residues of glyphosate and its metabolite AMPA in field pea, barley and flax seed following preharvest applications. Can. J. Plant Sci. 82: 485-489. Maximum residue levels have been established by Health Canada for seed of several crops treated with preharvest applications of glyphosate, a common practice on the Canadian prairies. Residues of glyphosate and its major metabolite aminomethylphosphonic acid (AMPA) were determined at crop maturity in flax seed at one site in western Canada and in the seed and straw of field pea and barley at another site following preharvest applications of the herbicide. Glyphosate was applied at rates of 0.45, 0.9 and 1.7 kg ha -1 to each crop in early August to mid-September at four stages of crop development. In all crops, mean residues of glyphosate and AMPA increased with increasing application rate of glyphosate and decreased when the herbicide was applied at later stages of crop development.

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Glyphosate

Duke

Baerson

Rimando

2003

Encyclopedia of Agrochemicals

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Glyphosate is the most widely used, biggest selling, and fastest growing herbicide in the world. The herbicidal properties of glyphosate were disvocered by Monsanto Agricultural Products Company in 1970, and it was first marketed by Monsanto in 1974. Since then, its use has continually increased, especially since the introduction of glyphosate‐resistant crops and the expiration of the glyphosate patent. Glyphosate is unique in chemical structure and molecular target site, and its unparalleled success has led many to consider it the most “ideal” herbicide available.

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Degradation of Glyphosate in Excised Leaves of Tobacco and Sugar Beet

Cited by 5 publications

References 12 publications

The impact of altered herbicide residues in transgenic herbicide‐resistant crops on standard setting for herbicide residues

The impact of altered herbicide residues in transgenic herbicide‐resistant crops on standard setting for herbicide residues

Residues of glyphosate and its metabolite AMPA in field pea, barley and flax seed following preharvest applications

Glyphosate

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