
Farmers in the United States are urging their government to challenge a looming Mexican ban on genetically modified (GM) corn under a regional free trade agreement, warning of billions of dollars of economic damage to both countries.
A late 2020 decree by Mexico President Andres Manuel Lopez Obrador would phase out GM corn and the herbicide glyphosate by 2024. Supporters of the ban say GM seeds can contaminate Mexico's age-old native varieties, and point to research showing adverse effects of glyphosate.