Groups seek glyphosate limits to protect butterflies

By Mateusz Perkowski, Capital Press

Monarch butterflies are declining in number due to herbicide spraying related to biotech crops, environmental groups claim.

Environmental groups seeking federal protection for monarch butterflies blame the use of genetically modified crops for the insect’s steep decline.

Petitioners claim that while there were as many as 1 billion monarchs as recently as the 1990s, their numbers have dropped to around 33 million.