Enlist Duo registration being withdrawn by EPA due to “synergistic effects”

Sunflower sprayed with 2,4-D

Chris Clayton at DTN is reporting this morning that EPA is withdrawing registration of Enlist Duo herbicide. The decision was posted yesterday in court documents. From the DTN report: “The filing was posted in a Ninth Circuit Court of Appeals case filed by the Natural Resources Defense Council and the Center for Food Safety against […]

The cost of preventing herbicide resistance


In my last post, I reviewed some recent research that suggests one of the best ways to delay the evolution of herbicide resistant weeds is to use mixtures of effective herbicides. Resistance is initially a very rare trait within a weed species, so the probability that any particular individual plant will be resistant to two […]

Want to reduce herbicide resistance? Spray more herbicides!


A while ago, I wrote a post summarizing the pros and cons of using a regulatory framework to slow the evolution of herbicide resistant weeds. As a part of that post, I suggested there exists a “resistance management paradox.” In a nutshell, to reduce the problem of herbicide resistant weeds, one important strategy may be to actually use more herbicide. […]

Dead plants are probably bad for earthworms

An earthworm. Taken in Swifts Creek, Victoria in June 2007. Source: Fir0002/Flagstaffotos

I’ve gotten a number of questions recently about a new study titled “Glyphosate-based herbicides reduce the activity and reproduction of earthworms and lead to increased soil nutrient concentrations” that was recently published in the online journal Scientific Reports. Although the title seems pretty straightforward, there are some flaws in the study design that preclude any broad conclusions from this research. […]

I Am Biased and So Are You: thoughts on funding and influence in science


This is the third (and probably final) post in a series on industry funding of my weed science program. The previous posts on this topic are here (Part 1) and here (Part 2). In this post, I’ll mostly describe some of my personal experiences. It is important to note that my experiences are not necessarily representative of others. I suspect that my […]

On transparency, intimidation, and being called a shill

A while back, a group of scientists involved in research or communication about various aspects of biotechnology (GMOs) were the subjects of freedom of information requests. Keith Kloor, who broke the story in Science, also posted one of the letters sent to the University of Illinois. The request asks for all emails in the last 2+ […]

GMOs, Herbicides, and the New England Journal of Medicine


An opinion piece was recently published in the New England Journal of Medicine, written by Dr. Philip Landrigan (an M.D.) and Dr. Charles Benbrook (PhD) titled “GMOs, Herbicides, and Public Health”. I was asked to review the piece this week, and I can only assume it will eventually make the rounds on social media. So I thought […]

An Evaluation of the Environmental Impact Quotient (EIQ)


I’ve always been interested in how changes in agricultural production practices impact the environment. In particular, I’ve followed the adoption of genetically modified (GM) crops since I was an undergraduate, and try to stay up to date on research relating to the environmental impact associated with these crops. Several publications over the last decade have […]