~~March 26, 2014~~
Glyphosate (N-(phosphonomethyl)glycine) is a broad-spectrum systemic herbicide used to kill weeds, especially annual broadleaf weeds and grasses known to compete with commercial crops grown around the globe. It was discovered to be a herbicide by Monsanto chemist John E. Franz in 1970. Monsanto brought it to market in the 1970s under the trade name “Roundup”, and Monsanto’s last commercially relevant United States patent expired in 2000.
Glyphosate was quickly adopted by farmers, even more so when Monsanto introduced glyphosate-resistant crops, enabling farmers to kill weeds without killing their crops. In 2007 glyphosate was the most used herbicide in the United States agricultural sector.
With its heavy use in agriculture, weed resistance to glyphosate is a growing problem. While glyphosate and formulations such as Roundup have been approved by regulatory bodies worldwide and are widely used, concerns about their effects on humans and the environment persist.
Glyphosate’s mode of action is to inhibit an enzyme involved in the synthesis of the aromatic amino acids tyrosine, tryptophan and phenylalanine. It is absorbed through foliage and translocated to growing points. Because of this mode of action, it is only effective on actively growing plants; it is not effective as a pre-emergence herbicide.
Some crops have been genetically engineered to be resistant to glyphosate (i.e., “Roundup Ready”, also created by Monsanto Company). Such crops allow farmers to use glyphosate as a post-emergence herbicide against both broadleaf and cereal weeds, but the development of similar resistance in some weed species is emerging as a costly problem.
Soy was the first “Roundup Ready” crop.
Since GMO soy arrived in our food, the EPA has increased the maximum residue level (MRL) of Glyphosate, the so called active ingredient in Roundup, by 233%, from 6ppm to 20ppm.
Why is glyphosate residue increasing on GMO soy?
The explanation for the increase is the appearance of glyphosate-tolerant weeds to which farmers are responding with increased doses and more applications of Roundup.
Most disturbing is that the MRL has not been increased based on new scientific evidence, but rather, in response to actual observed increases. This leads us to ask: Is it fair to force people to pay extra for organics to avoid poison in their food?
~~Studies Prove Monsanto’s Roundup Is Killing You~~
~~Published on Jun 26, 2013~~