U.S. — Monsanto and Ruveon LLC, a U.S. subsidiary of Bayer, filed petitions with the U.S. Department of Commerce and the U.S. International Trade Commission on June 30, 2026. The petitions seek antidumping and countervailing duties ranging from 68.9% to 446.47% on glyphosate imported from China.

Bayer is the only company currently manufacturing glyphosate in the U.S. and supplies approximately 60% of the glyphosate sold domestically. Bayer argues that Chinese producers are selling the product in the U.S. at less than fair value. A Bayer spokesperson stated that the domestic glyphosate business is not sustainable and that the action is needed to support long-term U.S. production for American farmers.

Agricultural associations have expressed concerns regarding the proposed duties. Jed Bower, President of the National Corn Growers Association, stated that Bayer's move was "no act of partnership" and was "purely for the benefit of the company and its shareholders." Sam Kieffer, CEO of the National Association of Wheat Growers, stated that "tariffs on imported glyphosate will be felt by American farmers." The American Soybean Association stated that duties would limit market competition, threaten cost spikes, and ultimately harm U.S. farmers.

A February executive order invoked the Defense Production Act and directed the USDA to ensure a continued and adequate supply of glyphosate-based herbicides. This order also directed the USDA not to jeopardize the corporate viability of domestic glyphosate producers like Bayer. On June 29, 2026, President Trump authorized an eight-month suspension of certain duties on Moroccan phosphate fertilizer. A Texas A&M study estimated that duties on imported phosphate fertilizer cost U.S. crop growers $6.9 billion from 2021 to 2025.

The International Trade Commission has approximately two months to issue a preliminary injury determination regarding the glyphosate petitions. A final decision from the Commerce Department on the glyphosate petitions could take up to a year.