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A legal battle pitching a French farmer against the world’s largest seed company could lend weight to health claims against pesticides if a court finds on Monday that Monsanto was at fault in a case of chemical poisoning.

In the first such case to be heard in court in France, grain grower Paul Francois says he suffered neurological problems including memory loss, headaches and stammering after inhaling Monsanto’s Lasso weedkiller in 2004.

He blames the agri-business giant for not providing adequate warnings on the product label.

A court in Lyon, southeast France, is due to give a verdict on the case later in the day.

Previous health claims from farmers have foundered because of the difficulty of establishing clear links between illnesses and exposure to pesticides.

“I am alive today, but part of the farming population is going to be sacrificed and is going to die because of this,” Francois, 47, told Reuters.

He and other farmers suffering from illness set up an association last year to make a case that their health problems should be linked to their use of crop protection products.

The agricultural branch of the French social security system says that since 1996, it has gathered farmers’ reports of sickness potentially related to pesticides, with about 200 alerts a year.

But only about 47 cases have been recognized as due to pesticides in the past 10 years. Francois, who suffers from neurological problems, obtained work invalidity status only after a court appeal.

Monsanto did not return calls on the subject, while its lawyer in the French court case declined to comment ahead of Monday’s ruling.