Video: Why isn't weed killer working anymore?

Why isn't weed killer working anymore? (video)
Credit: The American Chemical Society

Farmers used to worry about weeds. Then, herbicides solved that problem. At least for a while. In 1997, there were 432 new patents for herbicides; by 2009, there were only 65.

Developing broad-spectrum glyphosate and "Roundup Ready" crops worked so well that people basically stopped looking for new herbicides.

But then the weeds started fighting back.


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Citation: Video: Why isn't weed killer working anymore? (2022, September 19) retrieved 2 October 2022 from https://phys.org/news/2022-09-video-isnt-weed-killer-anymore.html
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