Integrated Crop Management News
 

Document Type

Article

Publication Date

8-1-2019

Abstract

Now is a great time to scout for Palmer amaranth (Amaranthus palmeri) in Iowa cropfields. As of late 2018, this species had been identified in over half of Iowa’s 99 counties.While new identifications have waned since the widespread introductions in 2016, Palmeramaranth is a species to watch out for in virtually any Iowa crop field. A native of theAmerican southwest, Palmer amaranth is more competitive than common waterhemp(Amaranthus tuberculatus), a pigweed native to Iowa. Both species are known for fastdevelopment of herbicide resistance, prolific seed production (>500,000 seeds/plantpossible), and prolonged emergence.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.