Palmer amaranth spreads in Midwest

Author: Kristy

Individual plants can yield more than 500,000 seeds

Palmer amaranth infesting cotton


by Rhonda Brooks, Farm Journal  |   January 5,2014

If you think waterhemp is bad, you don’t want to meet its close cousin, Palmer amaranth. For the past decade, glyphosate-resistant populations of this pigweed-on-steroids have plagued Southern cotton and soybean crops, many to the point of total loss.

Now, Palmer amaranth is on the move and headed north. To date, Palmer amaranth has been identified in nine Midwest states: Illinois, Indiana, Iowa, Kansas, Michigan, Missouri, Nebraska, Ohio and Wisconsin.

Iowa State University Extension weed scientist Bob Hartzler confirmed the first cases of Palmer amaranth in Iowa this past August on a farm just north of Council Bluffs.



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