Donna Farmer, Ph.D.

Chemistry Stewardship Lead, Monsanto Company

I’ve held a variety of roles in Monsanto’s regulatory group since joining the company in 1991. Regardless of my role, whether it was in our Stewardship Group or as a Toxicologist in our Product Safety Center, my focus is on the safe use of our products.

From this Expert

Posted On: Thursday, 9/26/2013 4:23 am
A: That is a great question, and I wish I could give you a short answer, but a lot of work and scientific evaluation have gone into understanding what happens to glyphosate after it is applied to Roundup Ready crops like corn and to ensuring your family and mine have safe food to eat. Most glyphosate applications in Roundup Ready corn occur before the corn kernels start to develop; therefore, very little glyphosate is present in the kernels, so residues in the kernels are low. Typical... Continue Reading
Posted On: Wednesday, 8/07/2013 6:53 pm
A: As a toxicologist who focuses on pesticide safety, I can tell you that glyphosate herbicides are backed by one of the most extensive worldwide human health, safety and environmental databases ever compiled for a pesticide product. This herbicide has been thoroughly reviewed and registered by the U.S. Environmental Protection Agency and other regulatory agencies around the world.Regulatory authorities and independent experts agree that glyphosate does not cause adverse reproductive effects in... Continue Reading
Posted On: Wednesday, 8/07/2013 3:02 am
A: Thanks for asking about the toxicity of glyphosate versus that of surfactants used with glyphosate. For herbicides like glyphosate to be most effective at controlling unwanted plants, they need to be applied with a surfactant. Surfactants (short for “surface-acting agents”) are soapy substances that help to reduce surface tension of the water so the drop of spray solution can spread over the surface of a leaf and help to penetrate the waxy layer (the cuticle) of the plant. Herbicidal soaps are... Continue Reading
Posted On: Tuesday, 8/06/2013 6:15 pm
A: Glyphosate, the active ingredient in Roundup branded herbicides, is not banned in any country and is registered in more than 100 countries around the world. Regulatory agencies such as the U.S. Environmental Protection Agency (EPA) and scientific bodies such as the World Health Organization have reviewed numerous studies conducted according to international guidelines and good laboratory practices and concluded that glyphosate does not cause cancer or birth defects.  There have... Continue Reading
Posted On: Tuesday, 7/30/2013 6:08 pm
A: The questions that you ask have already been answered on the website.  Please take a look at these responses and let us know if you have another question that we haven't addressed. Response regarding the requirements for protective clothing when applying pesticides:Why do employees of these companies wear protective clothing while spraying them with poison and why does the cafeteria at Monsanto serve only organic food and how do you all sleep at night?Responses regarding the safety... Continue Reading


No Studies were Found.