Study: Midwest farming linked to decline of monarch butterflies

ENVIRONMENT — The Heartland is no longer the land of milkweed and honey for monarchs.

Study links farming methods in U.S. to rapid decline of Monarch butterflies
A new study published last week in the Journal of Animal Ecology said a change in farming practices in the Midwest of the United States that led to a rapid decline of milkweed, where monarch butterflies lay their eggs in the spring and summer, is tied to the marked decline in the number of the butterflies.
—Toronto Globe and Mail