Invasive weed that threatens corn, soybean crops is spreading in Minnesota

Public enemy No. 1 for corn and soybean farmers, the Palmer amaranth weed, has made new incursions into Minnesota by way of livestock feed.

The Minnesota Department of Agriculture said this week that cows have eaten remnants of the weed in feed, then eliminated it in manure that farmers spread on fields.

http://www.startribune.com/devastating-invasive-weed-is-spreading-in-minnesota/509009672/