monarchspesticideIs the monarch butterfly the new polar bear?

The iconic insect, whose numbers have plummeted from 1 billion to 35 million over the past two decades, is emerging as the latest symbol of environmental catastrophe: In this case, the impact of industrial agriculture, genetically modified crops, and skyrocketing pesticide use on wildlife.

The latest fight over the future of the monarch broke out on Wednesday, when the U.S. Environmental Protection Agency approved a powerful—and highly toxic—new weed killer called Enlist Duo. Made by Dow AgroSciences and designed to be sprayed on genetically modified corn and soybean crops, Enlist Duo combines glyphosate and 2,4-D in a formula that’s supposed to kill weeds that have developed a resistance to each of those individual pesticides.

One wild plant that has not developed defenses against growing pesticide use is milkweed, which is essential to the monarch’s survival.

The rapid growth in industrial agriculture has wiped out milkweed through much of the Midwest, as the development of corn and soybeans resistant to glyphosate has given rise to the widespread use of the herbicide to control weeds.

In […]

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