Corn hybrids stressed after glyphosate applications

Wes Everman, Michigan State University Extension, Department of Crop and Soil Sciences -

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

I ran across some information the other day concerning stressed corn following glyphosate applications this spring, and thought I would make it available in case it impacts anyone in the state.

Corn growers who have planted Roundup Ready hybrids should be aware that five hybrids have shown stress symptoms after glyphosate applications; however, the symptoms are primarily due to environmental stresses. The hybrids range in maturity from 100 to 103 days and come from a single parent line making up less than one percent of total corn planted in the United States. Syngenta Seeds is working with growers and dealers to avoid potential damage from the stress symptoms. The hybrids are:

  • Golden Harvest H-7542GT
  • Garst 87Y26GT
  • NK N48G-GT
  • NK N48R-GT
  • NK N48R-GT/CB/LL

Growers who have planted these hybrids are urged to contact Syngenta at 1-800-258-0498 before making any further crop management decisions, including application of glyphosate.

The entire press release can be read here.

This article was published by Michigan State University Extension. For more information, visit https://extension.msu.edu. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464).

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