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 glyphosate herbicide

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.


Called by experts in herbicides "virtually ideal" due to its broad spectrum and low toxicity compared with other herbicides, Glyphosate was quickly adopted by farmers. Use increased even more 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 180 to 185 million pounds (82,000 to 84,000 tonnes) applied, and the second most used in home and garden market where users applied 5 to 8 million pounds (2,300 to 3,600 tonnes); additionally industry, commerce and government applied 13 to 15 million pounds (5,900 to 6,800 tonnes). While Glyphosate has been approved by regulatory bodies worldwide and is widely used, concerns about its 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 it (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.

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updated Sat. February 16, 2019

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With the exception of Roundup Ready crops in their prime, we can all relate to seeing a few weed escapes at the end of the year and not think much about ... That plant isn't just a new weed, but also carries resistance to important herbicides such as glyphosate and multiple other herbicide sites of action.
INDIANAPOLIS -- The first birth cohort study of its kind has found more than 90 percent of a group of pregnant women in Central Indiana had detectable levels of glyphosate, the active ingredient in Roundup, the most heavily used herbicide worldwide. Researchers from Indiana University and University of ...

The study, by researchers at Indiana University and the University of California San Francisco (UCSF), found that 93% of a cohort of pregnant women in the central Indiana region had detectable urine levels of glyphosate— the active ingredient in the herbicide Roundup®—which correlated with reduced ...
"One thing we cannot deny is that glyphosate exposure in pregnant women is real," Parvez said. "The good news is that the public drinking water supply may not be the primary source of glyphosate exposure, as we initially anticipated. None of the tested drinking water samples showed glyphosate residues.
Glyphosate is a widely used herbicide found in approximately 90 products, of which the best known is Monsanto's weedkiller, Roundup. It is used in farming, and in gardens, streets and parks. This controversy began with analysis of Glyphosate by the International Agency for Research on Cancer (IARC), ...
“We're right at that point where, if we don't get stuff done this week, bermudagrass pastures are fixing to turn green, and we won't be able to spray glyphosate anymore,” Lawson said, referring to one of the least expensive, non-selective herbicides on the market. Lawson said his phone lines began lighting ...

Now dicamba is being marketed as the answer to weed problems caused by weed resistance to Roundup herbicide and its generic versions. Dicamba is very toxic to most broadleaf plants including the pollinators that feed bees and butterflies, and it is also toxic to many garden plants and trees. Dicamba ...
Over the past months, the European Union and several member nations have vigorously debated re-authorizing glyphosate, the herbicide maligned by anti-GMO and ... In comparison, glyphosate — one of the world's most popular herbicides — is focused on weed control and is not used in organic farming.
That was a federal judge's takeaway after seeing slides that “sort of seared into my brain” that the main chemical in Monsanto's Roundup is ubiquitous in the Hawkeye state's cropland. “I got the impression that everybody takes a shower in glyphosate every day in Iowa,” U.S. District Judge Vince Chhabria ...
Kansas State University researchers have discovered how weeds develop resistance to the popular herbicide glyphosate, a finding that could have ... The research team noted that farmers should incorporate best management strategies — such as rotating herbicides and crops — to reduce weed pressure.
s popular weed killer Roundup causes cancer was dealt a blow by a judge's conclusions that the opinions of the experts testifying against it are “shaky,” a potentially devastating ... “The evidence that glyphosate is currently causing NHL in human beings” at current exposure levels is “pretty sparse,” he said.
Glyphosate - the key ingredient in the popular Roundup brand - is the herbicide that is widely used for controlling many weeds. ... The research team notes that farmers should incorporate best management strategies - such as rotating herbicides and crops - to reduce weed pressure: "This may allow ...
The Greek ministry of agriculture officially approved on Tuesday (6 March) the re-authorisation of the world's most commonly used weedkiller, Monsanto's Roundup, which contains controversial chemical substance glyphosate. According to the decision, the authorisation to place the product on the market is ...
Last Monday, a federal judge temporarily barred California from requiring cancer warnings on products that contain detectable amounts of glyphosate—the main ingredient in Monsanto's flagship herbicide Roundup. Trace residues of glyphosate in food products had already become a potential target of ...
Jeff McGrew stood in line with about 30 other west Kentucky farmers awaiting certification that they've been trained to apply the herbicide Dicamba. ... Even some farmers trained on proper use of the herbicide say it might not be worth the risk. ... They are depending on other herbicides, such as RoundUp.
However, Dr Broster said the good news was that the level of resistance in ryegrass to group A fop, group B and group D herbicides was much lower in that ... “The take home message is that glyphosate is our most important herbicide and resistance development should be considered whenever you use it.
Monsanto also sells seeds genetically modified to produce crops that can tolerate being sprayed with glyphosate as the surrounding weeds die. But the herbicide came under increasing scrutiny after the International Agency for Research on Cancer, based in Lyon, France — part of the World Health ...

The reported decision of [Sri Lanka's] National Economic Council (NEC) to lift the ban on glyphosate, a weedicide that was widely used in this country previously, though not yet officially communicated to those concerned nor formally gazetted will no doubt be widely welcomed, mostly by the tea industry.
Judge to Decide if Monsanto's Glyphosate Herbicide is 'Safe' ... Monsanto's glyphosate-based Roundup is now the best-selling herbicide in the world. ... Numerous plants have developed resistance to the chemical requiring heavier applications that are often combined with other, more potent herbicides.
The U.S. Environmental Protection Agency says glyphosate is safe for humans when used in accordance with label directions. A draft report by the agency last year concluded the herbicide is not likely to be carcinogenic to humans. The report noted science reviews by numerous other countries as well as a ...
Common ragweed, common waterhemp, giant ragweed, marestail, kochia, and Palmer amaranth have been confirmed glyphosate-resistant in Nebraska. With glyphosate no longer an option for the control of these glyphosate-resistant weed populations, growers are looking for herbicides with different ...
A federal judge on Monday temporarily barred California environmental officials from requiring cancer warnings on food products that contain traces of the herbicide glyphosate. The injunction by U.S. District Judge William Shubb leaves glyphosate on the state's so-called Proposition 65 list as a “chemical ...
Herbicide formulations as a whole include a variety of other chemicals, such as surfactants to help glyphosate enter plant cells, and other additives that ... This spurred [Deborah Kurrasch, a neuroscientist at the University of Calgary] to compare the effects of glyphosate alone to the effects of Roundup ...
The World Health Organization's (WHO) cancer agency is firmly defending its finding that a widely used herbicide is "probably carcinogenic" despite reports ... which uses glyphosate in its popular Roundup herbicides, revealed was ghostwritten by the company, Wild said (E&E News PM, 12 October, 2017).
A recently published study, focused on a small group of pregnant women in Indiana, finds nearly all of them have detectable levels of a heavily-used herbicide in their body. The study is the first to examine glyphosate levels in pregnant women. Indiana University environmental researcher Shahid Parvez ...
One would expect the organic wines and beers, and the carefully crafted independent beer brands to be free of glyphosate, as the herbicides are not ... wine industries must—and in many cases are—moving away from Monsanto's Roundup in order to avoid contamination by this harmful chemical herbicide.
All three make special formulations of dicamba for use on new soybean and cotton varieties that are genetically engineered to resist the herbicide, ... a new weapon against aggressive weeds such as pigweed that have become resistant to other herbicides such as glyphosate, also known as Roundup.
Herbicide formulations as a whole include a variety of other chemicals, such as surfactants to help glyphosate enter plant cells, and other additives that ... This spurred [Deborah Kurrasch, a neuroscientist at the University of Calgary] to compare the effects of glyphosate alone to the effects of Roundup ...
“We have conducted nearly 60 experiments on specialty crops in an effort to understand their sensitivity to drift from various agronomic herbicides,” he says. “Example: You just don't ... This new herbicide technology has got us back to clean fields, and back to where we were when Roundup worked well.”.
The glyphosate case also illustrates the “Era of Post-Truth” on scientific questions in the European Union, and in France in particular. The following fiction has become mainstream thinking: evil industries and productivist farmers are lobbying for the renewal of this herbicide at the detriment of health and the ...
In years past, many gardeners depended on herbicides to control for weeds, but since trace amounts of herbicides including glyphosate, the active ingredient in Roundup herbicide and other brands, have been discovered in drinking water supplies, home gardeners need to try other methods of weed ...
Nearly all farmers have faced this challenge, for waterhemp has a longer emergence window and documented resistance to multiple herbicides. “Waterhemp has ... “Panther Pro is an excellent foundation herbicide for LibertyLink or Xtend soybeans in the battle against glyphosate resistant waterhemp.”.
They were then treated with an herbicide. Treatments included an HG 2 herbicide (Pursuit); an HG 5 herbicide (atrazine); an HG 9 herbicide (Roundup); an HG 14 herbicide (Cobra): and an HG 27 herbicide (Callisto). All herbicides were applied with adjuvants as suggested in the herbicide labels.
The World Health Organization's (WHO) cancer agency is firmly defending its finding that a widely used herbicide is "probably carcinogenic" despite reports ... which uses glyphosate in its popular Roundup herbicides, revealed was ghostwritten by the company, Wild said (E&E News PM, 12 October, 2017).
Farmers have relied upon glyphosate-based herbicides to kill unwanted vegetation for more than four decades, but its use sparked hefty debate in 2015, when the World Health Organization's International Agency for Research on Cancer (IARC) concluded that it was “probably carcinogenic,” adding it to a ...
A separate review by the Environmental Protection Agency concluded in December that glyphosate, the active ingredient in Roundup and other ... The EPA's risk assessments, which sometimes rely on industry-funded studies, look at the long-term threat pesticides and herbicides pose based on the ...
After the controversial renewal of weed killer glyphosate's EU approval, its usage will be limited in Germany and “as soon as possible essentially terminated”, the former German agriculture minister Christian Schmidt (CSU) said. Schmidt upset the apple cart when he went rogue and significantly contributed ...
WASHINGTON – Republicans in Washington are threatening to cut U.S. funding for the World Health Organization's cancer research program over its finding that the herbicide Roundup is probably carcinogenic to humans. House Science Committee Chairman Lamar Smith says the 2015 finding by the ...
Monsanto also sells seeds genetically modified to produce crops that can tolerate being sprayed with glyphosate - the basis of Roundup - as the ... The EPA's risk assessments, which sometimes rely on industry-funded studies, look at the long-term threat pesticides and herbicides pose based on the ...
The Roundup Ready 2 Xtend system provides effective post-emergence (POST) control of these weeds along with many others. However, POST applications are only one part of a soybean herbicide program. To achieve successful weed control, all the herbicides you apply, either in the burndown, ...
Post-emergence herbicides kill emerged unwanted plants. Growing weeds will need pulling or a spritz of post-emergence herbicide such as glyphosate. The younger the plant, the more effective the post-emergence herbicide will be. Do not mow for ten days to two weeks after a postemergence is applied.
“With herbicides, glyphosate is not dicamba, is not sethoxydim and is not mesotrione,” Tardif says. “They differ in their efficacy, spectrum, residual and cost of manufacturing. A herbicide may be very good on the market — good weed control, good crop safety — but then may be too expensive to manufacture ...
Federal workers are spraying a weed-killer in the Los Angeles River a state agency recently labeled as carcinogenic. At issue is the chemical glyphosate, the active ingredient in Roundup, an herbicide used frequently in agriculture and as well as by homeowners, U.S. Rep. Adam Schiff, D-Burbank said.
The EC states it is seeking feedback on its process both as a “follow-up to the commitments made by the Commission in reply to the European Citizens' Initiative on glyphosate,” and in response to “citizens [that] have put into question the risk assessment based on studies provided by the industry and this in ...
Video: How glyphosate herbicide enables no-till, environmentally friendly farming · Viewpoint: EU's glyphosate herbicide fight reveals limits of Europe-wide governance · 'Roundup Facing the Judges': Documentary promotes glyphosate conspiracy theories, pseudoscience · EU may vote on complete ban of ...
A second new study suggests that the most widely used herbicide on the planet—Monsanto's Roundup weedkiller—could be causing more damage to our gut ... But as the authors of this latest study point out, glyphosate is not the only ingredient in herbicides like Roundup—it's one of multiple ingredients.
[O]n numerous occasions I have heard glyphosate critics argue that glyphosate should be opposed because it might alter the microbiome in humans. In a post on his Facebook page, The Mad Virologist discussed a recently published study on the effects of glyphosate on gut microorganisms, and inspired ...
Speaking to POLITICO in late November 2017, Rivasi was fresh from a defeat on glyphosate, a herbicide that the International Agency for Research on Cancer (IARC) said in 2015 could cause cancer. She was part of a group of MEPs who fought tooth and nail against the EU reapproving the chemical, ...
A field that received an average of 2.5 MOAs per application from 2004 to 2006 was 83 times less likely to produce glyphosate-resistant waterhemp seeds ... Dane Bowers, technical product lead for herbicides at Syngenta, stated that weed management programs utilizing three MOAs were able to delay ...
The herbicide glyphosate, available in commercial form from Monsanto as “Roundup” since the early 1970s, had by 2007 become the No. 1 herbicide in the United States agricultural sector, and the second most used in the home and garden sector. But the debate about whether the product causes ...


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