Monarch butterflies depend on milkweed as a food source and habitat, but crops like Monsanto’s Roundup Ready soy and corn are killing off these plants.
While the monarch butterfly population made a comeback this year, the past two decades have been a major struggle for the vanishing species, and GMO crops in the United States along the migration route are one of the main culprits threatening the survival of this species.
Genetically modified soy and corn crops, covering huge swathes of the U.S. midwest where monarch butterflies travel every year on route from Canada to Mexico, are to blame for declining food sources for caterpillars, Mexico’s La Jornada reported Thursday.