Two farmers have filed a proposed class-action lawsuit on Thursday against Monsanto and Bayer on the use of Roundup, a glyphosate-based weed killer.

The claim alleges the farmers were diagnosed with non-Hodgkin lymphoma after using the herbicide. 

The action was filed by Halifax law firm on behalf of farmers David Mitchell and Gretta Hutton who have used the weed-killer for years without any warning to use protective gear.