Written by: Paul Thompson
Primary Source: Thornapple CSA
I’m going to take a “time out” from the usual September theme today to remember what I was doing 15 years ago on September 11. I had gone into my office at Purdue University a little earlier than usual, and I was busily working on something that dealt with a front page story in the early edition of The New York Times that morning. The story was about then-recent research on the impact of genetically engineered crops on the monarch butterfly.
I’m not particularly interested in the monarch butterfly debate this morning, but here’s just a little bit of background (because inquiring minds want to know). In 1999 Cornell entomologist John Losey published a short note in the prestigious journal Nature indicating that when he fed pollen from Bt-transgenic corn to monarch butterfly larvae, it was fatal. On the one hand, this was not a very significant finding, because we (and by ‘we’ I mean scientists) already knew that the Bt toxin killed caterpillars. On the other hand, Losey’s note implicitly called the regulatory review of transgenic crops into question simply by pointing out a rather obvious “non-target” impact that had been overlooked by regulators who had been overly obsessed with estimating the effect of gene flow to wild relatives. None of the “on the other hand” stuff was actually in Losey’s article. You had to be a biotech insider with an unusual sensitivity to the regulatory process to “get it”.
On still another hand, an unsubtle and simple minded reader might have inferred that these Bt crops were going to exterminate monarch butterflies. Indeed, many scientists just assumed that this is what the article intended to imply. Now I should point out that I’ve never met John Losey and I have no idea what he intended to imply, but this morning I’m going with the less simplistic interpretation in the preceding paragraph. My point is that the broader science community reacted immediately against the simplistic interpretation, and their reaction caught the attention of the wider mass media. There were prominent stories in USA Today and The Washington Post that would have led you to believe Bt corn and cotton posed significant risk to the much loved monarch butterfly.
The science community doubted it, but pertinent to my reading of Losey’s intent, there was nothing in the scientific literature at the time to support their skepticism. It was an obvious “non-target impact” that had not been studied in 1999. I will suppress my temptation to launch into a tangent on “non-target impacts,” and herewith end the background.
Except to say that following Losey’s article there was a rush to conduct some research that would ascertain monarch’s actual exposure to Bt toxin from transgenic pollen under field conditions. The seed industry also responded by developing corn varieties that did not express the toxin in pollen, but that really is a tangent in the present context. The point that led me to launch into this subject during a month when I would normally be writing about food songs is that on September 11, 2001 I was sitting in my office at Purdue writing something now long forgotten about the Times piece reporting the results from those studies on the risk that Bt crops pose to non-target species (like monarch butterflies) This was around nine or ten o’clock on a Monday morning. Then my daughter called me from Texas. She almost never calls me at work and she did so that morning because she was upset about what was happening at the World Trade Center.
Needless to say, I forgot all about Bt crops and monarch butterflies, and I have never gone back to them. More pertinently, the story about monarchs and the science of risk assessment was pulled from the front page of The New York Times in later editions and if you scour any newspaper from the entire week of September 11, 2001 you will be hard pressed to find much about monarch butterflies or the environmental risks of transgenic crops. The world’s attention had been turned to other issues, and science stories that get into the details of thinking about environmental risks have been relegated to the back pages ever since.