Food Evolution, criticism, and retrenchment: Missed opportunities for discussion


By Terence Bradshaw, Ph.D.

There’s a new documentary film out now, “Food Evolution”, that is reported to be a potential game-changer on the public perception and acceptance of genetically engineered (GE, or oversimplified as GMOs) crops. I haven’t seen the film- it was just released and doesn’t have a screening near me, and a one-night only one at a non-traditional theatre venue at that, until next Thursday. It has been shown at quite a few pre-screening events, so I’ll allow some license and assume that the 45 university faculty and other academics who recently signed a letter calling the film “propaganda” (whom I’ll call, “The 45”, for lack of a better term) have all seen it, although I believe that would have been difficult given their geographic distribution across and around the country. So this is not a critique of the film, it’s a critique of the knee-jerk criticism around it and a plea for a more informed conversation.

Let me start by saying that I think documentaries are a terrible way to convey objective information on just about any topic. Every piece of media has a bias, from dry research papers to lectures to films and videos. But documentaries, via their mixed visual, audio, storytelling, editing, and one-way dialog methods are particularly egregious. There is a whole genre of “Food and Farm Films” that has emerged in the current millennium, and many of the most popular ones, e.g., Food, Inc., The Future of Food, GMO OMG, Genetic Roulette, etc., are indeed extremely one-sided and in some cases blatant propaganda against modern agricultural systems, especially the use of biotechnology in agriculture.  Much of the debate around GM crop technology is indeed fueled by well-financed, private companies and activist groups that have funded biased research and promoted media  that stretch the lines of clear and logical reporting. Food Evolution is the first, or at least to my knowledge the most high-profile, documentary that reports from the pro-science side of the debate, which is so often misrepresented in the public media around GE crops.

As I said, I haven’t seen the film, but I have been following the discussion around it since it was being made. I also read both the literature and the popular and semi-scientific press around GM and other modern agriculture practices, and their application to food system sustainability. As an academic myself, I feel it is critically important to discuss an argument on its own merits, and to only discredit an argument based on characteristics of its presenter when that person has continually and egregiously shown a disregard of facts, science, logic, and respect.

So, in the response to the film that started this post, I see numerous ad-hominem attacks, as well as several statements that simply state that the film does not agree with the authors’ beliefs and therefore should be rejected as propaganda. First is the statement that the film “manufactures scientific consensus [on the safety of GE crops] where no such agreement exists”, and cites an editorial letter signed by fifteen anti-GM scientists and activists. I’m no expert on what makes a consensus, but the definition I use is the facts and conclusions around a particular issue on which those who have fully investigated the subject reach agreement and move on to the next matter for discussion. Of course there is always more research to be done on matters, but the overwhelming majority of scientific societies and regulatory bodies and scientists with understanding of the biological nature of GM crops  have agreed that the use of biotechnology in agriculture is safe. That does not mean debate ends there- there is always need for discussion on the best uses of the technology, its deployment in specific crop/pest/production systems, effects on supply chains and economics, and certainly on the regulatory process surrounding them. But to say that there is a legitimate question of the safety of the technology as a whole is untrue.

The authors of the critique then accuse the filmmakers of editorial bias in how they included GMO opponents in the film. Again I have not seen it, but there are a few points to make here. First, the fact that the filmmakers included substantial input and screen time from GM opponents suggests that they were open to dialog. Second, of course the sound bites were edited; that’s what a filmmaker needs to do to fit their narrative into a ninety-minute story line. Now a few of those included in the film are crying foul because their truthful statements are being used in a film supporting modern agriculture, which goes against their narrative and that of the movement in which they align. Dr. Marion Nestle is one of the most critical, and has openly critiqued her portrayal in the film (and Michael Pollan has followed up with a less well-developed, “yeah, me too” statement).  However, I have not seen anyone point out where the statements used were edited as to be untruthful. I would be interested in seeing a director’s cut with the rest of the interviews, but let’s face it- this film was designed (biased, as we all are) to tell its story. If they wanted Dr. Nestle to answer the question of whether or not GM crops are inherently safe to consume, then it’s their right to show that, as long as they didn’t splice the piece together to make it up. Dr. Nestle has her own substantial platform to provide the “yes, but…” qualifications to her statement.

As for inviting all sides of the debate to the table, a recent, comprehensive review of GM crop safety, applications, problems, and promises that did just that was undertaken by the National Academies of Sciences, Engineering, and Medicine (NASEM). The study was as comprehensive as any that has been conducted before or since, and included substantial input from published studies, public comments (over 700 reviewed), statements in public meetings and webinars, and two rounds of blind peer-review which included signers of the letter that started this post. The resulting, 606 page report is quite comprehensive, and, overall, paints GM crops in a positive light but also offers nuanced analysis of the safety, environmental, and economic impacts of the technology as it is presently and may potentially be used. Naturally, after the report was released, critics cried foul that the authors and reviewers were tied to corporate interests, and NASEM has pretty clearly refuted those accusation of bias. Look, when assembling a panel of professionals with diverse and extensive experience on a certain issue, many will have worked in one way or another in that field- that’s what makes them experts. That does not immediately assume nefarious wrongdoing on their part when critically examining a topic they know well.

Early in the process, a group of academics, many of whom are among The 45, denounced the makeup of the NASEM panel as essentially too reductive in their expertise, and not sufficiently rounded out by social scientists, agroecologists, farmers, women, or international experts. However, biotechnology supporters derided the report as not positive enough toward green-lighting GM crops. If both extremes on an issue highlight similar but opposing (and thus balancing) viewpoints on a subject, I’m inclined to believe that the presentation is balanced. The point in discussing that report here, is that a comprehensive, public, balanced forum has been provided and results written that did indeed include diverse viewpoints, and still reaches the conclusion as this film does that GM crops are safe and may be a useful tool to improve the sustainability and safety of food production.

Continuing with the original letter, more ad-hominem attacks are presented. The project funder, Institute for Food Technologists, is “an advocacy organization which has long endorsed the biotech industry,” despite it’s 70-year history as an academic and industry organization in support of scientific advancement in food production. “Mark Lynas works with the Cornell Alliance for Science, formed in 2014 with a US$5.6 million grant from the Bill & Melinda Gates Foundation to “depolarize” the debate over GM foods” (So what? Are they spreading untruths?). Animal scientist Dr. Alison Van Eenennaam “has worked in the past for Monsanto (so what if she did, if her science is accurate and truthful?). The notion that a person must be entirely discredited, despite being a leader in their field, because of past employment or funding from a company that you dislike or distrust, is not a logical refutation of their work.

Full disclosure:  I once received match funding for a research trial on organic soil disease management from a company that was later bought by a division of Monsanto. I describe that here. If that makes me a biased pawn of agribusiness, so be it. More disclosure: my academic CV is publicly available here . It contains the word ‘organic’ over ninety times, I received both graduate degrees working in organic production systems, and I founded and direct an organic teaching farm. Does that make me a pawn of ‘Big Organic’? I’d say that both disclosures are common of the types of scientists who hold a balanced, farm and food-centered perspective on agriculture. And a review of scientific articles on GM crops comparing funding sources and conclusions also indicated that there was little concern of false science in the peer-reviewed literature based on study funding, but that professional conflicts of interest (e.g. a scientist working for a corporation) were correlated with results favorable to the corporation (Diels et al. 2011).

So, public, University scientists tend to publish diverse articles regardless of funding source, including corporate funding (likely because we get ‘graded’ partly on the number of papers we publish); while corporate scientists publish information that helps the corporation, which is, by definition, a profit-driven institution. That doesn’t surprise me one bit, nor does it a) discount the independence of good public scientists nor b) discredit well-designed science that is published with a profit motive. Then again, poor science that muddies the discussion and is backed by corporate funds is indefensible, including some science that is expressly and overtly funded by organic food companies to cast doubt on the safety of non-organic food, thus increasing demand for their products which is well-detailed in a Slate article from 2015.

The letter writers then highlight a series of reports, articles, and stories critical of GM crops, but typically heavy on bias in reporting. Many of the reasons they oppose biotech crops (since everyone without a tinfoil hat seems to agree that they are not unsafe), including consolidation of agribusiness, seed patents, monocultures, pest and weed resistance, and declining farmer livelihoods are real problems, but the root cause is not biotech crops. Our agricultural systems are diverse and complicated, and each of those issues predates the relatively recent introduction of GM crops. While agroecologists and alternative food system supporters advocate for a fundamental reorganization of farming and society, the fact remains that incremental improvements within the massive food system do indeed generate substantial environmental, economic, and social benefits which were detailed in a 2014 meta-analysis (Klümper and Qaim 2014)  that concluded, “on average, GM technology adoption has reduced chemical pesticide use by 37%, increased crop yields by 22%, and increased farmer profits by 68%. Yield gains and pesticide reductions are larger for insect-resistant crops than for herbicide-tolerant crops. Yield and profit gains are higher in developing countries than in developed countries…”

As I have said, agriculture and our food system are extremely complicated, and there are many good farmers, scientists, and advocates working hard to make it better. The film Food Evolution is one step toward supporting those people in an arena where public discourse has consistently and often questionably cast doubt on their methods and aspirations. The coordinated, continued fear mongering over not just GM crops, but modern agriculture in general, demonizes farmers and other public servants while setting back progress on some real, important agricultural issues. Unfortunately, the opportunity for farm and food system advocates to pull a chair around this film to discuss issues is being missed, and each side appears to be retreating to their respective corners. That’s sad, and does a disservice to the roughly 90% of consumers who are not deeply involved in food production issues but just want and deserve a safe, plentiful, and nutritious food supply. I’m not the only one to observe this, others have highlighted how this film won’t change the discussion among values-based groups that simply cannot be convinced that farmers and scientists who support and use modern agricultural practices are doing so to be both competitive in the marketplace and to provide food for a growing population. No one is out to get you, and farmers really are good people, even when they choose to support Monsanto because they like the crops they offer

I planned to rebut some of the few specific accusation in the letter about specific GM applications that really do change the narrative, as they are not tied to agrichemical giants and their pesticides, and expressly support smallholder farmers. But I’ll let you read more about Hawaiian papayas and Ugandan bananas separately. Instead, I’ll leave with a plea to get out of our corners, stop ad-hominem and kneejerk reactions, and discuss issues rather than dismiss our ‘opponents’. And that includes the pro-GM community that has been smugly rallying behind this film yet participating in their own shady criticism, like using the Freedom of Information Act to harass members of The 45 and others critical of GM crops (I’m looking at you, Stephan Neidenbach). Members of The 45 include past and present colleagues, classmates, and teachers of mine, and I’ll happily engage them on these issues and ask that they consider sources contrary to their viewpoints, including Food Evolution, in framing their discussions. I still think documentaries make lousy sources for objective information, but they do present opportunities for discussion, and I encourage people from all sides to participate constructively as this conversation unfolds.

Food Evolution will be screened for one night only on June 29 at Main Street Landing Performance House in Burlington, VT, and is presented by the Vermont International Film Festival.

Literature cited:

Diels, J., M. Cunha, C. Manaia, B. Sabugosa-Madeira, and M. Silva. 2011. Association of financial or professional conflict of interest to research outcomes on health risks or nutritional assessment studies of genetically modified products. Food Policy 36: 197-203.

Klümper, W., and M. Qaim. 2014. A meta-analysis of the impacts of genetically modified crops. PloS one 9: e111629.



Just a quick debunking post: Glyphosate and ‘toxic wheat’

Here we go again. It’s not scary Monsanto Gasmask Man, but it does feature Crop Sprayer Bad Guy. And more of the same misinformation. My explanation is below- this isn’t meant to be a dissertation or groundbreaking, blow-up-the-internet post, just one I can point to when this toxic wheat talk pops up…

On old article from just made it to my feed, shared by some friends of mine. I’m a little sad inside when good people get duped by the alt health ‘fake news’ media, so I’ll refute the posts’ claims, one-by-one, to settle their minds a bit.

The first claim: “Standard wheat harvest protocol in the United States is to drench the wheat fields with Roundup several days before the combine harvesters work through the fields as withered, dead wheat plants are less taxing on the farm equipment and allows for an earlier, easier and bigger harvest.”

First, let’s consider “drench” here. That suggests to me to spray to the point of saturation. Actually, when fields are sprayed with glyphosate, you’re usually talking about 2-6 pints per acre. That amounts to about 1/3 of a drop per square foot. Hardly a drenching, and if you do the math on the amount applied versus the biomass produced, not even taking into account degradation, soil binding, and runoff, you’re talking about parts per billion. As for “standard protocol”, it is actually quite rare to use glyphosate as a dry down material for wheat. Like, fraction of a percent rare. Most glyphosate is used pre-planting, well before there is any crop to be contacted.

Next is the use of Dr. Stephanie Seneff as a reliable source of information on the issue. Dr. Seneff is a computer scientist with zero training on plant science, toxicology, or epidemiology. She has recently been making the rounds on a kick against glyphosate ad has published several papers showing how it and GMOs (but never explaining which or their interactions) are to blame for rises in autism, cancers, celiac, nutritional disorder, you name it. The problem is, her papers are published in pay-to-publish, non peer-reviewed bunk journals and have been widely criticized across the scientific community to the point where she has no, none, zero credibility in this field. She may be a good computer modeler, I won’t doubt that. But these papers generally involve her developing a theoretical model to show a certain outcome, then of course her model gives that outcome, and she explains it with a bunch of bad science and poor reasoning. Even others in the alt health realm consider her a quack. Let’s remember that all of the supposed harms in the article are based on this questionable junk source.

As for USDA data showing “99% of durum wheat, 97% of spring wheat, and 61% of winter wheat has been doused with Roundup as part of the harvesting process. This is an increase from 88% for durum wheat, 91% for spring wheat and 47% for winter wheat since 1998”? The source given doesn’t even go to USDA data, but rather to another alt-health site the healthyhomeeconomist, which does indeed show a graph of percent of planted wheat acres treated with herbicides, fungicides, and insecticides, but to does not link back to the data. Nor does it say anything about the wheat being treated with glyphosate preharvest; usually, wheat fields are treated preplant which allows for no-till planting which is substantially better at conserving soil moisture, nutrients, and carbon (Alvarez et al. 1995, Reicosky et al. 1997, West and Marland 2002, McLauchlan 2006). Not to mention that glyphosate has a long track history of being among the safest herbicides available (Giesy et al. 2000, Williams et al. 2000, Roos et al. 2005, Mink et al. 2011, Mink et al. 2012, Székács and Darvas 2012, Williams et al. 2012, Kier and Kirkland 2013).

So you have a quack computer scientist saying that glyphosate causes all sorts of subtle but increasing health problems, an activist/alternative blog promoting data that doesn’t actually say what they say it does, and all demonizing a material with a long track history and better safety profile than its alternatives. I’d say this original article doesn’t have a leg to stand on.

But don’t just trust me, Snopes had the same thing to say:

“The most important point to take away from this article, however, is that it presents a flawed premise and doesn’t actually demonstrate any connection between current methods of wheat production and medical maladies in humans who consume it because:

  • The article does not document any recent increase in or unusually high level of wheat sensitivity in humans.
  • Even if an increase in wheat sensitivity were documented, that wouldn’t necessarily mean the phenomenon was due to a change in the production of wheat; it could simply mean that we are getting better at recognizing and identifying wheat sensitivities that have existed for a long time but previously went undiagnosed.
  • A documented increase in wheat sensitivity could have any number of environmental causes apart from the use of glyphosate in wheat production, and no causal connection between the two has been proved here.”



Alvarez, R., R. A. Díaz, N. Barbero, O. J. Santanatoglia, and L. Blotta. 1995. Soil organic carbon, microbial biomass and CO2-C production from three tillage systems. Soil and Tillage Research 33: 17-28.

Giesy, J. P., S. Dobson, and K. R. Solomon. 2000. Ecotoxicological Risk Assessment for Roundup® Herbicide, pp. 35-120. In G. W. Ware (ed.), Reviews of Environmental Contamination and Toxicology: Continuation of Residue Reviews. Springer New York, New York, NY.

Kier, L. D., and D. J. Kirkland. 2013. Review of genotoxicity studies of glyphosate and glyphosate-based formulations. Critical reviews in toxicology 43: 283-315.

McLauchlan, K. 2006. The nature and longevity of agricultural impacts on soil carbon and nutrients: a review. Ecosystems 9: 1364-1382.

Mink, P. J., J. S. Mandel, J. I. Lundin, and B. K. Sceurman. 2011. Epidemiologic studies of glyphosate and non-cancer health outcomes: a review. Regulatory Toxicology and Pharmacology 61: 172-184.

Mink, P. J., J. S. Mandel, B. K. Sceurman, and J. I. Lundin. 2012. Epidemiologic studies of glyphosate and cancer: A review. Regulatory Toxicology and Pharmacology 63: 440-452.

Reicosky, D. C., W. A. Dugas, and H. A. Torbert. 1997. Tillage-induced soil carbon dioxide loss from different cropping systems. Soil and Tillage Research 41: 105-118.

Roos, A. J. D., B. Aaron, J. A. Rusiecki, J. A. Hoppin, M. Svec, M. Dosemeci, D. P. Sandler, and M. C. Alavanja. 2005. Cancer Incidence among Glyphosate-Exposed Pesticide Applicators in the Agricultural Health Study. Environmental Health Perspectives 113: 49-54.

Székács, A., and B. Darvas. 2012. Forty years with glyphosate, pp. 247-284. In M. N. A. E.-G. Hassaneen (ed.), Herbicides–properties, synthesis and control of weeds. . InTech Europe, Rijeka, Croatia.

West, T. O., and G. Marland. 2002. A synthesis of carbon sequestration, carbon emissions, and net carbon flux in agriculture: comparing tillage practices in the United States. Agriculture, Ecosystems & Environment 91: 217-232.

Williams, A. L., R. E. Watson, and J. M. DeSesso. 2012. Developmental and reproductive outcomes in humans and animals after glyphosate exposure: a critical analysis. Journal of Toxicology and Environmental Health, Part B 15: 39-96.

Williams, G. M., R. Kroes, and I. C. Munro. 2000. Safety Evaluation and Risk Assessment of the Herbicide Roundup and Its Active Ingredient, Glyphosate, for Humans. Regulatory Toxicology and Pharmacology 31: 117-165.


Agvocates: It’s your turn to stop the mud slinging

I wrote a blog post recently that criticized the use of graphic, inaccurate imagery in opposing GMOs and pesticides, and explained why doing so is offensive to farmers. Of anything I have written professionally on social media, this has been the most shared and well-accepted by the ag community. But watch what you’re saying, agvocates, because I have a few words for you, too.

Lets’ start this by saying I deplore the use of fear-based imagery in marketing and education. That’s represented in the aforementioned post. But I have also recently called out ‘agvocate’ voices for using hyperbole or bad reasoning in their arguments. When we take sides first and ask questions later, we risk falling on sloppy arguments ourselves. Painting any issue as black or white is a dangerous proposition. Agriculture, in particular, is an extremely complex field, with multiple biological, physical, and social parameters that interact and demand a higher level of analysis than some more cut-and-dry topics. In my job, I have feet firmly planted in the organic and non-organic buckets, and I tend to operate in that middle ground between the two where sustainability truly lies. There is a lot to learn from working within the organic system- that’s why we teach our summer undergraduate and Farmer Training Program students within the restrictive confines of a certified organic farm so that they may develop better skills when their farms really rely on it.

And that’s central to my point. All farmers, and often more so organic farmers, are very good at assessing these multiple, interacting forces that drive their management decisions. So when I see the argument made that, “so what, organic uses pesticides too,” I cringe a little:

For example, this meme that is often tossed around as evidence that organic is as evil as non-organic does no one any service except to make agvocates feel better about themselves. But think about it. You’re saying that organic pesticides are untested, and are just as bad or worse than non-organic pesticides. Sorry, that’s bullshit on many levels.

First, any pesticide approved for organic that is sold commercially must undergo the exact same safety testing as non-organic pesticides. That means that they all are subjected to the same toxicity, carcinogenicity, reproductive, and ecological effects. Period. So stop saying that organic pesticides aren’t tested. More important is to highlight that our pesticide safety and registration system is robust, risk management-based, and works. It’s because of that system that we have removed or curtailed uses of some of the indeed more toxic materials like azinphos-methyl and rotenone.

Next, the notion that organics indiscriminately douse their crops in copper sulfate and rotenone is ludicrous. For one thing, organic growers do indeed have a USDA certification standard that they must meet, unlike non-organic growers, which requires a prevention plan that includes biological, physical, and cultural controls. In my IPM world we talk that talk and often practice it, but no one (unless we’re part of a third-party certification program, which is few of us) calls us on whether or not we designed the system to reduce pesticide needs or sought other methods first. In my experience, except for certain instances where aggressive organically-approved inputs are required to manage pests (e.g., apple scab, black rot on grapes in the Northeast), organic farms by and large eschew prophylactic use of pesticides.

Now on to those pesticides that are supposedly drenched on organic farms. In several cases, the meme is just plain wrong about what is used. Take methyl bromide, for example- there is absolutely no allowance for it in organic production. Yes, strawberry nurseries use it when starting plants that are sold to organic farms, but so do apple nurseries use pesticides to get trees established that are sold to organic growers, and dairy farms use non-organic (often GMO) feed to produce the shit used to make organic-certified compost. There is certainly an argument to be made that organic producers require non-organic farms and suppliers to survive, but to suggest that organic growers use methyl bromide is just disingenuous.

As for rotenone and nicotine, yup, they’re nasty. But nicotine is expressly disallowed in the organic regulations, so just stop with that. And rotenone? Isn’t available as anything but a piscicide (meaning no use on crops in the U.S., since 2005), and the NOSB petitioned for its removal from the list years ago. I’ve struggled with growing organic apples in the northeast as a researcher for twelve years and have had massive insect outbreaks and trust me, rotenone, nicotine, and homemade concoctions were never on the table.

In my line of work, I consider myself a professional skeptic- I demand that evidence be used to support new and contrary claims. That said, I am also willing to take in new evidence on a matter. That’s why I was a bit surprised when a fellow horticultural professor exclaimed in her Facebook group that a new paper that reported that phylloshpere bacteria contributed to nitrogen assimilation in the host plant was bunk until “some time and radiolabelled nutrient studies…move this from correlation to causation” when that’s exactly what the paper was about (Doty et al. 2016). I’ll cut her some slack, she admitted to posting before reading first thing in the morning without coffee. But the knee-jerk reaction that an alternative system may be responsible for at least a portion of the nitrogen cycle in plant environments is indicative of a bias against alternative systems that goes beyond skepticism. Look, I am the first person to question permaculture, moon planting, and similar alternative production practices, but if I am presented with solid, peer-reviewed evidence that runs contrary to the traditional mode of thinking, I listen.

At the same time, it is difficult to stomach the hyperbole in a headline like, “Organic Farming is Bad for the Environment,” posted from a leading science skepticism site. I understand fully the organic yield gap (Kravchenko et al. 2017), and the contradictions of the need for nitrogen from non-organic farms and soil carbon loss from tillage (McLauchlan 2006). But this articles takes quite a lot of liberty in its assumptions, ignores life cycle analysis of nitrogen synthesis, and does not address potential advances in organic, and more so, sustainable production systems moving forward with the tools we now have available. Are there issues with crop yield, food affordability, and (possibly) soil quality decline under organic systems? Maybe, but there are also issues with agricultural runoff, soil quality decline, pest resistance development, and food distribution (among other things) in the present non-organic system. There’s no high horse to ride when we take sides.

I prefer to think back to the 1990s vision of a Low Input Sustainable Agriculture model which includes the best tools from the organic and non-organic worlds to develop a farming and food production system that minimizes unintended impacts while feeding a growing population and rewarding farmers. This vision was highlighted in a recent review publication of European literature on organic farming (Tuomisto et al. 2012):

“This meta-analysis has showed that organic farming in Europe has generally lower environmental impacts per unit of area than conventional farming, but due to lower yields and the requirement to build the fertility of land, not always per product unit. The results also showed a wide variation between the impacts within both farming systems. There is not a single organic or conventional farming system, but a range of different systems, and thus, the level of many environmental impacts depend more on farmers’ management choices than on the general farming systems. In our view, there will be no single best farming system for all circumstances. Rather it will be necessary to compose ‘optimal’ systems from a series of particular practices that relate to specific circumstances, constraints and objectives.”

This ideal system will only come when we stop demonizing one another and act together. I can’t speak for the Organic companies and activist groups behind much of the demonizing of non-organic food production (Schroeder 2014), they really are bastards. But as farmers, academics, and informed citizens we owe it to everyone to step up our game and rise above it.


Doty, S. L., A. W. Sher, N. D. Fleck, M. Khorasani, R. E. Bumgarner, Z. Khan, A. W. Ko, S.-H. Kim, and T. H. DeLuca. 2016. Variable nitrogen fixation in wild Populus. PloS one 11: e0155979.

Kravchenko, A. N., S. S. Snapp, and G. P. Robertson. 2017. Field-scale experiments reveal persistent yield gaps in low-input and organic cropping systems. Proceedings of the National Academy of Sciences.

McLauchlan, K. 2006. The nature and longevity of agricultural impacts on soil carbon and nutrients: a review. Ecosystems 9: 1364-1382.

Schroeder, J. 2014. Organic marketing report, pp. 16. In B. Chassy, D. Tribe, G. Brookes and D. Kershen [eds.], Academics Review. Academics Review.

Tuomisto, H. L., I. Hodge, P. Riordan, and D. W. Macdonald. 2012. Does organic farming reduce environmental impacts?–A meta-analysis of European research. Journal of environmental management 112: 309-320.


Monsanto Gas Mask Man: Activist imagery and its meaning to farmers

Edit: a few clarifying edits were made after initial publication. Also, a second, related essay was posted to call out hypocrisy and lazy thinking among the modern-agriculture advocates.

Recently I had a spat with a colleague over what I thought was her use of negative imagery toward non-organic farmers in a lecture. One thing that really got me going was the use of what I call “Monsanto Gas Mask Man” in a slide that discussed some of the dangers of pesticides.


We’ve talked since, I aired my concerns and she hers, and we are in a good place. I respect her. But those images are everywhere in the online and other discussions around modern agriculture. I’ve stewed a bit over my reaction to them, and have come up with a few points of discussion.

I’ll frame this first by mentioning my farming background. I was raised on a small, conventional Vermont dairy farm in the 1980s and 90s. We weren’t organic (no one was doing organic dairy then), but we were a largely pasture-based farm that struggled to compete in the modern commodity landscape. Dad did his best to ‘modernize’- we used synthetic fertilizers; employed improved herd genetics to get our production per cow up; grew corn occasionally using herbicides; and even docked tails in the later years to reduce somatic cells counts in our milk. We were a 45-50 head, tie stall dairy that struggled in the greater economy, yet we held on when many of our neighbors went out of business, and my folks sold the cows at the turn of the millennium after Dad had been working a full-time job off the farm for about five years (Mom always did, or we wouldn’t have eaten) so that he could pay himself to farm.  I know the blood, sweat, and literal tears that farmers put into their work, to feed people. And while there are certainly impacts from many agricultural practices on the environment and rural economies, I have never known a farmer, even the few jerks I know in the business, who wants to hurt people.

Since leaving my home farm, I have worked in the industry as a fruit grower and more so as a researcher and instructor. The majority of my current work is with non-organic apple and grape growers, who use agrichemicals as a regular part of their work. The recent discussion over GMO and other farming production methods in the popular media has been largely and carefully directed by activists to paint ‘conventional’ agriculture in an extremely negative light. The rhetoric around non-organic agriculture has been directed using intentionally provocative terms and images, in order to sway public opinion based on fear and emotion rather than science and reason (Clancy and Clancy 2016, Kangmennaang et al. 2016).

The “Monsanto Gas Mask Man” plays into that imagery. Such an image suggests a soldier in a war- the gas masks evoke direct wartime imagery; and the hazmat suits, especially the super-thick nitrile gloves, suggest an outer space-like hostile environment. Faces are obscured, like Storm Troopers. Notice how the company logo is prominent in each well-staged picture. Such imagery places farmers, who are really only trying to make a living, often to sustain a multi-generational family farm in tough times and to produce food for all of us, as disposable pawns at the hands of a corporate general.

I have several problems with the use of such imagery, but I don’t knock my colleague for using it. She has not worked in a pesticide-intensive crop, and therefore does not readily have farm pictures available to use in a lecture. A google image search for ‘pesticide exposure’ brings up a whole host of scary images. However, there are a number of inaccuracies in the photos posted above.

For one, I have seen and worn much personal protective equipment (PPE) used to protect the applicator during spraying, and I have never seen a farmer use the single-canister gas mask-style respirator seen in the photos. I don’t doubt they exist and are labeled for use in applying pesticides, they aren’t commonly used on farms. But where are they commonly seen? In military, survivalist, and other wartime situations. There are some really creepy images out there, and they are often watermarked as stock images, e.g. carefully crafted images for use in developing marketing and other persuasive (activist) campaigns:


Most growers I know, when required to wear a respirator, choose a half-mask type, similar to ones used by painters:


Of course, the specific pesticide label legally dictates the amount of PPE to wear when mixing or applying in order to protect the handler from carefully measured and known hazards. I’ll cover the materials shown in the original images in a minute, but for now, lets’ consider glyphosate, highlighted in the imagery by its original brand name Roundup, and almost always identified by its original manufacturer, Monsanto:


Much has been written about the dangers of glyphosate and various papers and studies that claim to support its toxicity- we can discuss that later. However, considerable, long-term evaluation of the research ad safety data indicate that glyphosate is, for a pesticide, relatively safe (Williams et al. 2000, Roos et al. 2005, Mink et al. 2011, Mink et al. 2012, Székács and Darvas 2012, Williams et al. 2012, Kier and Kirkland 2013). Because of that, the PPE required for its application includes “long-sleeved shirt and long pants, shoes plus socks.” That’s it:

6. Worker applying glyphosate-based herbicide and wearing appropriate personal protective equipment. TB photo.

But in popular and activist press, a very different image is used:


And we’re back to the scary imagery…in an NPR article nonetheless!

As for the specific images referenced at the beginning, let’s consider the materials in the photos. I will never say that every pesticide is safe, in fact I teach pesticide safety as part of my job, I am also familiar with the safety and registration process the EPA uses to review and license pesticides. A typical pesticide requires around $10-20 million for registration, and much of that is used in required short- and long-term testing for acute and chronic toxicity, carcinogenicity, mutagenetic, and environmental effects. The results of that testing determine allowed use restrictions, including rates, timing, and other safety considerations; the requirements for those tests would take several hundreds of pages to print. My point is that pesticides are indeed inherently harmful, and there is a good safety program in-place to regulate their use, which includes the use of appropriate PPE, and use restrictions that limit rates, timing, and other application criteria. (Why even use them at all? To reduce the 25-80% of crop losses attributable to pests that would decimate our food supply (Oerke 2006)).

So, consider those original images. The first material highlighted, Lasso, is an herbicide containing the active ingredient alachlor which is indeed pretty nasty, as it is a pretty powerful carcinogen. How much alachlor is used in modern agriculture in the U.S.? Extremely little, because it has been replaced by the dramatically safer glyphosate, aided by herbicide-tolerance traits in genetically engineered field crops. So the demon GMOs have indeed helped to push out a pretty toxic material, which goes against the scary spray guy analogy. (Ironically, the little bit of alachlor still used is primarily in ‘Non-GMO Project’, corn and soybeans. That Non-GMO Project sure is doing good things, huh?).



How about that other material in the Greenpeace photo, “E605 Forte”? That’s an insecticide containing parathion, a highly toxic organophosphate (OP) material whose use was cancelled in the U.S. in 1991, and which is severely limited elsewhere in the world (although I imagine used in the developing world, unfortunately). The whole class of OPs has been reviewed since the adoption of the U.S. Food Quality Protection Act in 1995, and not only has their overall use gone down substantially since then, but the new materials that have been developed in their wake have significantly lower toxicity profiles (Jones et al. 2010).

At the risk of dragging things out, my aversion to this imagery is based on the lies behind it- that farmers are trying to hurt anyone, that our food system is unsafe and riddled with dangerous chemicals, and that organic farmers inherently are above such nastiness. Because here I am, spraying an approved pesticide on my organic apple crop, wearing the appropriate PPE for the job.

9. The author applying sulfur-based pesticides to an organic apple crop. TB photo.

Farming isn’t performed by beautiful elves flitting about their fields of green, nor is it done by ogres and trolls at the hands evil corporate overlords. It’s done by real people, who bust their butts to feed us (you). Demonizing them (us) via violent imagery and rhetoric is an insult to us all, as farmers, consumers, and citizens, and that’s why I speak out against it. With no disrespect to my dear friend who started me on this rant, I suggest we all step back and think about how we portray them, especially those of us who know better.



Clancy, K. A., and B. Clancy. 2016. Growing monstrous organisms: the construction of anti-GMO visual rhetoric through digital media. Critical Studies in Media Communication 33: 279-292.

Jones, V. P., S. A. Steffan, L. A. Hull, J. F. Brunner, and D. J. Biddinger. 2010. Effects of the loss of organophosphate pesticides in the US: opportunities and needs to improve IPM programs. Outlooks on Pest Management 21: 161-166.

Kangmennaang, J., L. Osei, F. A. Armah, and I. Luginaah. 2016. Genetically modified organisms and the age of (Un) reason? A critical examination of the rhetoric in the GMO public policy debates in Ghana. Futures 83: 37-49.

Kier, L. D., and D. J. Kirkland. 2013. Review of genotoxicity studies of glyphosate and glyphosate-based formulations. Critical reviews in toxicology 43: 283-315.

Mink, P. J., J. S. Mandel, J. I. Lundin, and B. K. Sceurman. 2011. Epidemiologic studies of glyphosate and non-cancer health outcomes: a review. Regulatory Toxicology and Pharmacology 61: 172-184.

Mink, P. J., J. S. Mandel, B. K. Sceurman, and J. I. Lundin. 2012. Epidemiologic studies of glyphosate and cancer: A review. Regulatory Toxicology and Pharmacology 63: 440-452.

Oerke, E.-C. 2006. Crop losses to pests. The Journal of Agricultural Science 144: 31-43.

Roos, A. J. D., B. Aaron, J. A. Rusiecki, J. A. Hoppin, M. Svec, M. Dosemeci, D. P. Sandler, and M. C. Alavanja. 2005. Cancer Incidence among Glyphosate-Exposed Pesticide Applicators in the Agricultural Health Study. Environmental Health Perspectives 113: 49-54.

Székács, A., and B. Darvas. 2012. Forty years with glyphosate, pp. 247-284. In M. N. A. E.-G. Hassaneen (ed.), Herbicides–properties, synthesis and control of weeds. . InTech Europe, Rijeka, Croatia.

Williams, A. L., R. E. Watson, and J. M. DeSesso. 2012. Developmental and reproductive outcomes in humans and animals after glyphosate exposure: a critical analysis. Journal of Toxicology and Environmental Health, Part B 15: 39-96.

Williams, G. M., R. Kroes, and I. C. Munro. 2000. Safety Evaluation and Risk Assessment of the Herbicide Roundup and Its Active Ingredient, Glyphosate, for Humans. Regulatory Toxicology and Pharmacology 31: 117-165.