Integrated Crop Management News
 

Document Type

Article

Publication Date

5-9-2019

Abstract

As of May 6 2019, 36 percent of Iowa’s corn is planted according to the USDA-NASS. Under cool conditions (50 to 55oF soils), it may take more than three weeks for corn to emerge whereas corn in 70oF soils can emerge in less than a week (Licht et al., 2001). Cool and wet conditions at or around planting delay emergence and provide seedling disease pathogens, like Pythium, a favorable environment and longer time to infect corn seeds or seedlings (Munkvold and White, 2016; Robertson and Munkvold, 2007). The cool and wet conditions could also result in herbicide injury due to the slow growth and prolonged exposure to herbicides. Additionally, for corn planted shortly before (24 to 36 hours) the cold spell over the weekend of April 27 and 28, imbibitional chilling may be a concern. Corn planted ahead of the cold spell could still experience cold injury, which causes abnormal shoot growth like twisting or problems with root system development.

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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