Integrated Crop Management News
 

Document Type

Article

Publication Date

6-19-2006

Abstract

Recent lack of rain, and windy conditions that hampered herbicide applications, have resulted in weedy fields that are effectively reducing yields in corn and soybean. A particular concern is fields with heavy populations of common lambsquarters that have not been controlled effectively by glyphosate. In discussions with growers and applicators, the failure of glyphosate, even when applied at 48 oz per acre (1.1 lb ae/acre) to provide control, does not appear to be attributable to evolved resistance to glyphosate, but rather a combination of factors: common lambsquarters that is too large and has developed during dry conditions, and applications that were too late to provide consistent control and protection of potential crop yields.

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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/.