The US has been funding spraying of coca farms in South America. Roundup is one of the major herbicides. "Roundup Ready" crops are genetically modified to make them resistant to glyphosate. Samples of roundup resistant coca plants had been found in Colombia & Bolivia. It was thought that someone put a lot of effort into genetically modifying the plants, but it turns out that the samples were not GMO but rather mutants. Collaboration between coca growers spread the resistant plants.

https://en.wikipedia.org/wiki/Roundup_Ready

https://en.wikipedia.org/wiki/Boliviana_negra

https://web.archive.org/web/20050205025108/http://www.wired....