paraquat pot 

In the 1960s, the Government sponsored a program called "Paraquat Pot" in which they sprayed the very harmful herbicide paraquat on marijuana fields in South America, which were distributed mostly to Americans. It was called Paraquat Pot.

Yeah, we used to smoke that paraquat pot back in the 60s. They just don't make it like they used to.

paraquat pot by Niefleed Ewws Wenweib June 21, 2008