This article was originally published by Undark and appears here as part of Canada s National Observer s collaboration with Climate Desk.
Around 10 years ago, in the fierce heat of the Kansas summer, many of the noxious kochia weeds invading Phillip Stahlman’s research fields simply wouldn’t budge when sprayed with a mixture of two widely used herbicides, glyphosate and dicamba. Just a few months earlier, in the cooler spring weather, the herbicide mixture had easily triggered the weed’s small thin leaves to curl up and turn brown, signalling the plant’s demise.
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