The presence of Palmer amaranth was recently confirmed in Harrison County near the Missouri River. The infestation was in two fields that have a history of land application of sludge. Because of the magnitude of the infestation, we believe the weed has been present for at least two growing seasons. We suspect the weed probably has spread to other fields in the area, but at this time we have not verified this.
Iowa State University
Hartzler, Robert G. and Pope, Richard O., "Palmer Amaranth Confirmed in Western Iowa" (2013). Integrated Crop Management News. 57.
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