Eating Glyphosate
Each Pin on this board is a quote from a single peer reviewed journal article. All Photos and Artwork by Toxno founder - Hartmut Michael Günther. Active link to original article is in first Pin. http://dx.doi.org/10.1016/j.foodchem.2013.12.054
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Extensive use of glyphosate over vast land areas may lead to shifts in weed populations and selection of glyphosate tolerant weeds. This, in turn, typically triggers the use of higher doses or more applications of glyphosate, which can further accelerate the evolution of glyphosate resistance in weed species. Such a spiral is clearly not sustainable for farmers, but may also affect the consumer through plant tissue accumulation of glyphosate residues.
It is the full, formulated herbicide (typically one of the many Roundup formulations) that is used in the field, and, thus, it is relevant to consider, not only the active ingredient glyphosate and its breakdown product AMPA, but also the other compounds present in the herbicide formulation. For example, herbicide formulations containing glyphosate commonly also contain adjuvants and surfactants to help stabilise the herbicide and to facilitate its penetration into the plant tissue.
The herbicide glyphosate is the most widely used herbicide globally, with a production of 620,000 tons in 2008. The world soybean production in 2011 was 251.5 million Metric tons, with the United States (33%), Brazil (29%), Argentina (19%), China (5%) and India (4%) as the main producing countries. http://www.sciencedirect.com/science/article/pii/S0308814613019201 http://www.pinterest.com/toxno/eating-glyphosate/
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Roundup Ready GM-soybeans sprayed during the growing season had taken up and accumulated glyphosate at concentration levels of 0.4–8.8 mg/kg. In contrast, conventional and organic soy-beans did not contain these chemicals. We thus document what has been considered as a working hypothesis for herbicide tolerant crops, i.e., that: ‘‘there is a theoretical possibility that also the level of residues of the herbicide and its metabolites may have increased’’ is actually happening.
The issue of pesticide residues becomes more complex in the near future as new GM plants may: (i) be tolerant to other/additional herbicides (e.g., 2,4-D and/or dic- amba), eventually several stacked in the same plant, (ii) have al- tered tolerance to glyphosate (likely higher), (iii) metabolise herbicides into new breakdown products having altered toxicity and requiring potentially altered methods of detection.
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Food Compositional studies that have overlooked (not measured) pesticide residues contain serious shortcomings. Chemical residues, if present, are important because (i) they are clearly a part of a plants composition, and (ii) they may add toxic properties to the final plant product either by itself or by affecting the plant metabolism. This is particularly relevant for herbicide-tolerant varieties. http://www.pinterest.com/toxno/eating-glyphosate/