evidence: For more than 40 years, U.S. farmers have used glyphosate to kill weeds before planting corn feed for livestock. More recently glyphosate is being used by farmers growing Roundup-Ready GMO crops and as a desiccant, to speed the harvest of grain crops like wheat, oats and barley, as well as edible beans and several other crops. Such "harvest aid" uses of glyphosate involve spraying fields about two weeks prior to harvest. According to a February 2016 study in Environmental Sciences Europe, glyphosate is the most widely used pesticide. Stauffer Chemical Co. first patented glyphosate as a mineral chelator in 1964. Then in 1974, Monsanto introduced this chelator as an herbicide. Conventional farmers spray glyphosate on genetically engineered corn, oats, soybeans and wheat before it is harvested. Consumers also use glyphosate on their lawns and gardeners. [...] Glyphosate is showing up predominately in food made with oats because oats and wheat are sprayed with glyphosate to kill the crop right before harvesting. It is a practice that is not necessary and should be stopped. Companies need to step up and make sure their products are free of glyphosate before they hit store shelves.