2019 Herbicide Guide for Iowa Corn and Soybean Production
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Palmer amaranth (Amaranthus palmeri) – It has been five years since Palmer amaranth was first identified in Iowa, with the species now having been reported in 54 counties. The majority of introductions occurred during 2016 due to the planting of native seed mixes contaminated with Palmer amaranth seed.
Hartzler, Robert, "2019 Herbicide Guide for Iowa Corn and Soybean Production" (2018). Extension and Outreach Publications. 806.
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