GMO Blight-Proof Chestnut Trees Now Free from USDA Regulation
Published Date: 8/28/2026
Notice
Summary
We are advising the public of our determination that Darling 54 American Chestnut (Castanea dentata), which was developed using genetic engineering for tolerance to the fungal pathogen, Cryphonectria parasitica, is no longer considered regulated. Our determination is based on our evaluation of information and data submitted by the State University of New York College of Environmental Science and Forestry in its petition for a determination of nonregulated status, available scientific data, a plant pest risk assessment, and public comments received in response to previous notices announcing the availability of the petition for nonregulated status and a draft plant pest risk assessment. This notice announces the availability of our written determination and supporting documents.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Deregulation of Darling 54 Chestnut
As of August 28, 2026, Darling 54 American Chestnut (Castanea dentata), engineered for tolerance to the fungal pathogen Cryphonectria parasitica, is no longer regulated under APHIS regulations at 7 CFR part 340. This means activities APHIS regulates — importation, interstate movement, or release into the environment of this organism — are no longer subject to those part 340 regulatory requirements.
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