Extension of Deregulation to Corn Developed Using Genetic Engineering

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Contact: aphispress@usda.gov

Washington, D.C., May 19, 2026—The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) is extending deregulation to a corn variety, designated as DP51291, developed using genetic engineering for insect-resistance and glufosinate-ammonium tolerance by Pioneer Hi-Bred International, Inc. (Pioneer). 

APHIS previously deregulated these traits in another Pioneer corn variety, referred to as DP23211 corn. 

Along with Pioneer’s extension request, APHIS prepared a Plant Pest Risk Similarity Assessment (PPRSA), concluding DP51291 corn is not more likely to pose a plant pest risk than the previously deregulated DP23211 corn variety.

APHIS published the PPRSA, a preliminary Determination based on the PPRSA, and Pioneer’s deregulation extension request for a 30-day public review and comment period. 

APHIS reviewed all public comments on these documents and determined DP51291 corn is unlikely to pose a plant pest risk and is extending deregulation. The effective date of this deregulation extension is May 19, 2026. 

View the Plant Pest Risk Similarity Assessment and Determination (333.16 KB)