glyphosate

During the mid-nineties, the introduction of crops genetically engineered to withstand the herbicide glyphosate led to the chemical’s usage ramping up in agricultural areas across the Midwest, destroying large amounts of milkweed in the process.

Reproducing standard forestry practices, she and her sister, Robyn, doused birch and alder “weeds” with toxic 2,4-D and glyphosate.

When slathered in a stress-inducing chemical, the plants with glyphosate resistance produced a lot less nectar than wild plants.