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Glyphosate and Roundup Brand Herbicides


For more than 40 years, farmers and others have depended on glyphosate as an efficient and cost-effective tool that can be used safely to control problematic weeds.

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Farmers Need to Protect their Crops from Weeds and other Pests

Every year, as much as 40 percent of the world’s potential harvests are lost to damaging pests, including weeds. According to the Food and Agriculture Organization of the United Nations (FAO), these losses could double without pesticides and other crop protection practices. That’s why most farmers, both organic and conventional, use some type of pesticide to keep weeds and other pests from hurting their crops.

“Superweeds explained in one minute”

[Without glyphosate] The organic matter content of the soil is likely to be detrimentally affected. Yields would decline again and increased ploughing would release more CO2 from the soil into the atmosphere. It would be a significant step backwards.

Farmers around the world make multiple decisions each day regarding how best to protect their crops. Weeds steal water, sunlight, and nutrients from crops. Insects and disease can also have a devastating impact on food production. Fortunately, advances in modern agriculture have provided them with a variety of solutions for the task.

Glyphosate Is a Vital Tool for Farmers 

Weeds cause problems in farm fields because they steal water, sunlight, and nutrients from the crops farmers are working hard to grow. To help farmers protect their crops from weeds, we offer a variety of solutions. One of the most popular products is called glyphosate, which is the active ingredient in our Roundup® branded agricultural herbicides. Glyphosate has been a breakthrough for farming. Not only are glyphosate-based products effective against weeds, they also help farmers grow crops more sustainably.

Supporting the Environment 

Glyphosate-based herbicides can help reduce the need for tillage—plowing or turning over the soil. Tillage has always been a powerful weed-control tool, but it can encourage erosion of valuable topsoil. In addition, the process of disturbing the soil releases sequestered carbon into the atmosphere. Using glyphosate-based herbicides, farmers can leave their soil intact while the previous year’s crop residue or organic matter remains on top of the soil. This supports soil health and provides a reduction in greenhouse gas emissions associated with tillage.

Reducing tillage can diminish soil erosion by up to 90 percent and, in 2014 alone, reduced carbon emissions by an amount equivalent to removing nearly 2 million cars from the road.

Crop Protection Is a Collection of Tools, Products, and Practices

There is no single approach in the crop protection fight. Farmers today have a variety of tools, including state-of-the-art pesticides, advanced data analytics, and precision technologies. While these tools are individually powerful, when farmers use them together, it enhances their effectiveness while minimizing the environmental impact of agriculture.

Using only a single tool, like glyphosate-based herbicides, can encourage species of weeds to develop resistance to that tool. To prevent this resistance from developing while still fighting invasive weeds, farmers use a combination of approaches. Bayer supports this by working closely with university researchers, industry partners, and individual farmers to provide the best advice about how to combine crop protection methods.

History of Safe Use 

For over 40 years, the overwhelming conclusion of experts worldwide has been that glyphosate can be used safely according to label instructions. There have been more than 800 scientific studies and reviews that prove glyphosate is safe for use.

Like all pesticides, regulatory authorities around the world routinely review the latest safety data on glyphosate. Most recently, in December 2017, the EPA reaffirmed the safe use of glyphosate:

The draft human health risk assessment concludes that glyphosate is not likely to be carcinogenic to humans. The Agency’s assessment found no other meaningful risks to human health when the product is used according to the pesticide label. The Agency’s scientific findings are consistent with the conclusions of science reviews by a number of other countries as well as the 2017 National Institute of Health Agricultural Health Survey.

Recent Developments 

IARC’s Report on Glyphosate

In March 2015, a group called IARC incorrectly classified glyphosate as a “probable carcinogen.” IARC is one of four programs within the World Health Organization (WHO) that has reviewed glyphosate, and the only one to have made such a finding.

IARC’s classification is inconsistent with the overwhelming consensus of regulatory authorities and other experts around the world, who have assessed all the studies examined by IARC – and many more. While IARC’s erroneous classification has attracted media attention and been used repeatedly by activist groups to generate unwarranted fear and confusion, regulators around the world continue to support the safe use of glyphosate.

  • Since IARC classified glyphosate, regulatory authorities in the United States, Europe, Canada, Korea, Japan, New Zealand and Australia have publicly reaffirmed that glyphosate does not cause cancer. Additionally, in May 2016, the Joint FAO/WHO Meeting on Pesticide Residues (JMPR) concluded that “glyphosate is unlikely to pose a carcinogenic risk to humans from exposure through the diet.” Click here for more.
  • National Institute of Health Agricultural Health Study: The largest study on agricultural workers and health conclusively shows there is no link between glyphosate and cancer. This study has looked at 89,000 agricultural workers and spouses over 20 years, and the conclusion is crystal clear. Glyphosate does not cause cancer. Read the report here.

Company Statements

California Glyphosate Case - DeWayne Johnson (Aug. 10, 2018)

We have deep sympathy for Mr. Johnson’s plight. Our hearts go out to the Johnson family, and we understand their desire for answers. Glyphosate is not the answer. Glyphosate does not cause cancer. The verdict was wrong. We will appeal the jury’s opinion and continue to vigorously defend glyphosate, which is an essential tool for farmers and others. We are confident science will prevail upon appeal. Consumers, growers, and customers can remain confident in the continued safe use of glyphosate. This decision in no way changes our existing registrations for our glyphosate-based herbicides. Click here for our full statement.

The Environmental Working Group (EWG) is spreading false information (Aug 15, 2018)

The special interest group EWG issued a press release announcing they detected trace amounts of glyphosate in some food items. Importantly, these levels are not even remotely close to any level of concern. Regulatory authorities have strict rules when it comes to pesticide residues. The Environmental Protection Agency (EPA), for example, sets daily exposure limits at least 100 times below levels shown to have no negative effect in safety studies. Click here for our full statement.

California Prop 65 (Aug. 16, 2018)

Monsanto is party to two separate legal challenges related to the unjustified listing of glyphosate under Prop 65. These legal challenges are ongoing and happening in parallel:

  1. In November 2017, Monsanto joined a broad coalition of agriculture groups from across the country to challenge the constitutionality of California’s unjustified listing of glyphosate under Prop 65. In December 2017, the Coalition petitioned the U.S. District Court for the Eastern District of California to impose a preliminary injunction to suspend the effect of the listing until the case is decided on its merits. In February 2018, the Court ruled in the Coalition’s favor, granting a preliminary injunction that blocks the implementation of Prop 65’s warning requirements until the Court has the chance to rule on the lawsuit. This preliminary injunction remains in place.
  2. Separately, in January 2016, Monsanto filed a legal challenge in California state court to keep glyphosate off the Prop 65 list. In March 2017 a state judge issued a ruling dismissing our challenge. We subsequently filed a petition for review seeking to have the California Supreme Court consider our appeal of the state judges ruling. On Aug. 16, the California Supreme Court denied our petition. Below is our statement on this latest development.

    Statement Issued Aug. 16, 2018
    : “There is no scientific basis to list glyphosate under Prop 65. The listing contradicts 40 years of science and the conclusions of regulatory bodies around the world. The listing requires judicial intervention and correction. We’re considering our options for further legal action. Meanwhile, the federal injunction in place ensures that unconstitutional warning labels are not required on glyphosate products.”

Brazil Court Lifts Injunction (Sept. 3, 2018)

Bayer welcomes the ruling issued on Sept. 3, 2018 by a Brazilian court that ensures growers in that country will have continued access to glyphosate-based herbicides. Previously, on Aug. 3, 2018, a Brazilian judge issued an injunction that could have prohibited the registration and use of glyphosate-based herbicides and several other crop protection products in the country. The injunction was not a ruling on glyphosate safety but only related to delays in routine regulatory reviews of crop protection products. Subsequently, on Sept. 3, a Brazilian court ruled in favor of a remedy filed by the Federal Government to overturn the injunction before it took effect and ensure that Brazilian growers can continue to use glyphosate-based products. Click here for our statement.