Integrated Crop Management News

Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.

Identifying waterhemp and Palmer amaranth

September 3, 2013
Palmer amaranth vs. Waterhemp identifying features

By Bob Hartzler, Department of Agronomy


Several people have submitted images of escaped "pigweeds" wondering whether the plants were Palmer amaranth. In all cases, except the earlier reported situation in Harrison County, the plants in question have been waterhemp, although at casual glance they could easily be mistaken for Palmer amaranth. These cases highlight the difficulty in differentiating the two species by the general growth habit and shape of plants.


Pages