Herbicide resistance predates herbicides by over 80 years

The Weed Science Society of America (WSSA) recently posted a press release headlined “WSSA Scientists Say Herbicide Resistance Predates Genetically Engineered Crops by 40 Years.” From the WSSA release: You may think weeds resistant to herbicides are a new phenomenon linked to the overuse of glyphosate in genetically engineered crops, but according to the Weed Science Society of America (WSSA) nothing could be further from the truth. This year marks only the 20thanniversary of glyphosate-resistant crops, while next year will mark the 60th anniversary …

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Large-scale impacts of herbicide-resistant weeds

As I was updating information on herbicide resistant weeds for class this week, I wanted to find some hard numbers on the large-scale impact herbicide-resistance can have. Obviously, my first thought was to find information on cotton production in the South. Glyphosate-resistant Palmer amaranth has been something of a poster child for the potentially devastating impacts of herbicide resistant weeds in the last few years. It has been dubbed a “superweed” by many, including Nature News, the New York Times, …

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Managing herbicide-resistant weeds

I made this word cloud in preparation for the class I’m teaching tomorrow. I thought it was pretty interesting, so I decided to post it here and share. In class, we’re going to discuss the effectiveness of various practices to manage herbicide resistant weeds. In preparation for tomorrow’s discussion, I asked my students to review 5 different herbicide industry websites to see what they were recommending to manage herbicide resistant weeds. This word cloud was created by taking recommendations from …

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Where are the super weeds?

In a recent issue of Nature, Natasha Gilbert took “A hard look at GM crops.” Ms. Gilbert states: “it can be hard to see where scientific evidence ends and dogma and speculation begin.”   “Researchers, farmers, activists and GM seed companies all stridently promote their views, but the scientific data are often inconclusive or contradictory. Complicated truths have long been obscured by the fierce rhetoric.” I agree wholeheartedly. Especially when browsing the internet, there is a lot of misinformation, half-truths, and …

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