A caterpillar crawls on the leaf of a genetically-engineered soybean plant Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel) CORRECTS: Spelling of Champaign from Champagne

Genetically-engineered soybeans grow Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel) CORRECTS: Spelling of location to Champaign from Champagne

A device measures carbon levels in soil Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel)

Wolfgang Busch, director of the Harnessing Plants Initiative at the Salk Institute, holds up a soybean root that was genetically-engineered to grow downward Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)

Ashish Rajurkar, a research scientist at the Salk Institute, examines a greenhouse of genetically-engineered soybeans Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel)

Plants with contrasting root systems, genetically engineered, left, and not, are displayed at the Salk Institute for Biological Studies in La Jolla, Calif., Wednesday, Dec. 3, 2025. (AP Photo/Annika Hammerschlag)

Todd Michael, a research professor at the Salk Institute for Biological Studies, works at his lab in La Jolla, Calif., Wednesday, Dec. 3, 2025. (AP Photo/Annika Hammerschlag)

Ashish Rajurkar, a research scientist at the Salk Institute, digs out root samples from genetically-engineered soybeans Tuesday, Sept. 1, 2026, at a research field in Urbana, Ill. (AP Photo/Joshua A. Bickel)