Agricultural groups, including the National Association of Wheat Growers, filed a lawsuit in U.S. District Court against California and its regulatory conclusions related to glyphosate, the popular active ingredient in herbicides.

At issue is California’s decision last July to force what plaintiffs are calling “false and misleading warning labels” under the state’s Proposition 65 labeling law. Prop. 65 is a voter-passed initiative that requires the state to publish a list of all chemicals known to cause cancer, birth defects or other reproductive harm.

California opted to include glyphosate on that list, in spite of what plaintiffs say is evidence to the contrary. NAWG says California ignored its own scientific reviews, as well as those conducted by the U.S. Environmental Protection Agency and the Euripean Chemicals agency in making the claim.

“The unified voice of this diverse coalition of agriculture and business groups illustrates the devastating impact California’s flawed action would have across the country,” said Gordon Stoner, President of the National Association of Wheat Growers, the lead plaintiff in the case. “California’s erroneous warning about glyphosate is unconstitutional and would result in higher food costs, crushing blows to state and agricultural economies and lost revenue up and down the entire supply chain.”

Fellow agricultural association plaintiffs in the case include Associated Industries of Missouri, the Iowa Soybean Association, Agribusiness Association of Iowa, Missouri Chamber of Commerce and Industry, Missouri Farm Bureau, the National Corn Growers Association, North Dakota Grain Growers Association, South Dakota Agri-Business Association and the United States Durum Growers Association.