Paraquat and Glyphosate are both herbicides, but they contain different chemicals Glyphosate is the main chemical in the weed killer Roundup, while Paraquat is the brand name for the herbicide paraquat dichloride. Both Paraquat and Glyphosate are poisonous if inhaled or ingested, but Paraquat is more poisonous, being 28 times more toxic than Glyphosate.
Drugwatch has written about Paraquat, including its uses, poisoning, and link to Parkinson’s disease. They have also reported on an investigation that found an alleged cover-up of Paraquat’s Parkinson’s risk by a worldwide chemical company.