USDA Approval Advances Efforts to Restore the American Chestnut08/30/2026Efforts by researchers at SUNY College of Environmental Science and Forestry (ESF) to restore the American chestnut tree to the American landscape took a significant leap forward with an approved designation from the U.S. Department of Agriculture (USDA) that ESF’s genetically modified Darling chestnut trees are unlikely to pose a threat to other plants.none