WASHINGTON 鈥 US farm and trade officials raised 鈥済rave concerns鈥 over Mexico鈥檚 agricultural biotechnology policies in meetings with their Mexican counterparts on Monday, as lingering disagreements threaten decades of booming corn trade between the neighbors.

Washington鈥檚 concerns center on the Mexican president鈥檚 push to ban so-called biotech corn, or varieties developed with genetically modified organisms (GMOs), from entering Mexico if it is destined for human consumption. The United States accounts for most of Mexican corn imports.

鈥淲e made it clear today that if this issue is not resolved, we will consider all options, including taking formal steps to enforce our rights under the聽US-Mexico-Canada Agreement (USMCA),鈥 the office of聽US Trade Representative (USTR) Katherine Tai said in a statement on Monday.

鈥淢exico鈥檚聽proposed approach, which is not grounded in science, still threatens to disrupt billions of dollars in bilateral agricultural trade, cause serious economic harm to聽US聽farmers and Mexican livestock producers, and stifle important innovations needed to help producers respond to pressing climate and food security challenges,鈥 it added.

US officials traveled to Mexico to discuss聽Mexico鈥檚聽approach to agricultural biotech products.

Mexico鈥檚聽agriculture ministry declined to comment, while the country鈥檚 economy ministry, which handles trade, did not immediately provide comment.

The countries have聽聽over聽a decree issued by Mexican President Andres Manuel Lopez Obrador in 2020 that sought to phase out imports of genetically modified corn and the herbicide glyphosate by 2024.

Mexico decided to聽聽of聽GMO聽corn purchases from the United States until 2025, a decision deemed satisfactory by the聽US government, Mexican Agriculture Minister Victor Villalobos said last month.

Mexico is one of the biggest buyers of聽US corn with American聽farmers sending about 17 million tonnes of mostly聽GMO聽yellow corn to Mexico annually, the majority of which is used for animal feed. Mexican officials have said they will keep importing GM corn for animal feed.

US officials are 鈥渕aking it crystal clear鈥 that Mexico must abide by its USMCA commitments and this 鈥渋s a significant development and good news for corn growers,鈥 said Tom Haag, president of the National Corn Growers Association.

Biotech industry group BIO said it appreciated US efforts to get Mexico to 鈥渕aintain a science-based risk regulatory system,鈥 according to statement from Beth Ellikidis, vice president for agriculture and environment. 鈥 Reuters