John K. Soteres, Ph.D.

Global Weed Resistance Lead, Monsanto Company

I have worked in weed science including herbicide evaluation and discovery since receiving my Ph.D. in agronomy in 1981. My area of focus today is working with university, government, and private sector weed scientists around the world to develop research programs to better understand the causes and ways to manage herbicide resistance and to develop and implement farmer directed stewardship programs. I am active in both U.S. and international weed science societies that are focused on the science of weed management including the biology of weeds, non-chemical weed control options, herbicide physiology and use, and the genetics and causes of weed resistance.

From this Expert

Posted On: Wednesday, 7/31/2013 4:56 pm
A: Your question is a good one, and I can see the reason you would be concerned.  Let me share a few facts that are not forthcoming from many of the articles and blogs written on this topic.  Hopefully, you will see that the core issue is less about reasons for or against Roundup Ready crops and is more about using technologies to promote a more sustainable agricultural production system. Over the past several decades, farmers and agricultural scientists have come to the following... Continue Reading
Posted On: Wednesday, 7/31/2013 9:37 am
A: The prevalence of Roundup Ready crops has not caused weeds to become resistant to glyphosate; rather, resistance is a function of how glyphosate has been used in RR crops and in other areas.  In general, resistance to an herbicide is related to how it is used and the potential for resistance to evolve.  Because of the recognized safety and environmental benefits of glyphosate, many farmers relied on it as the sole herbicide to control weeds, and we now know that this practice was not... Continue Reading
Posted On: Tuesday, 7/30/2013 12:36 pm
A: To address this issue, one must first look at the current state of herbicide resistance and then examine the definitions of "sustainable agriculture" and the recommendations of public and private weed scientists to best manage resistance. Resistance is not new, nor is it isolated to glyphosate. The first case of resistance to an herbicide was recorded in 1957, and since this time resistance has been recorded for just about every herbicide being used today.  Relative to most of... Continue Reading
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