Wheat farmers in the U.S. are frustrated with Monsanto Co. and they’re headed to court.

According to the suit filed in the U.S. District Court for the Eastern District of Washington, American wheat farmers and the Center for Food Safety claim that Monsanto is not adequately protecting the country’s wheat market from contamination by its unauthorized wheat. The suit seeks class action status.

The plaintiffs say they are being harmed by lower wheat prices as foreign buyers are reluctant to purchase U.S. wheat. This suit is similar to another filed last week by a Kansas farmer who claims he and other growers are suffering financial hardship after the discovery of unapproved biotech wheat Monsanto claimed it stopped producing nine years ago.

On May 29, the Department of Agriculture announced that an Oregon farmer had discovered the experimental wheat growing on his farm.

Read more about this story on Reuters.

For more InsideCounse stories and columns about Monsanto’s legal woes, see:

Farmer infringed on Monsanto’s soybean patents, Supreme Court rules

IP: The Supreme Court revisits patent exhaustion in Bowman v. Monsanto

Supreme Court appears to side with Monsanto in seed patent case

Monsanto lawyer says company will sue only farmers who illegally use patented seed technology

Monsanto seed patent case headed to Supreme Court