EPA OKs Spinach-Powered Virus to Save Citrus Crops from Doom
Published Date: 4/7/2026
Rule
Summary
The EPA just gave a green light to a special Citrus Tristeza Virus (CTV) that carries spinach proteins to protect citrus crops, meaning no strict residue limits are needed on citrus fruits or feed. Farmers, food makers, and pesticide companies can now use this virus safely starting April 7, 2026, saving time and money on extra testing. If anyone wants to object, they have until June 8, 2026, to speak up.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Tolerance Exemption for Engineered CTV on Citrus
The EPA exempted residues of Citrus tristeza virus (CTV) strain T36 expressing Spinach Defensin Proteins SoD2, SoD2-1, and SoD2* from the requirement of a tolerance on citrus (fruit, citrus group 10-10). This exemption is effective April 7, 2026, and applies only when the virus is used according to label directions and good agricultural practices.
No Analytical Method or Numeric Limit Required
EPA stated an analytical enforcement method is not required because the exemption is established without any numerical residue limitation for the CTV-SoD2 variants on citrus. That means regulators will not require a specific laboratory test tied to a numeric tolerance for these residues.
EPA Found No Human Health Risk
EPA concluded that CTV strain T36 expressing SoD2, SoD2-1, and SoD2* will not cause unreasonable adverse health effects to people, including infants and children, when used as labeled. The agency noted an acute oral LD50 greater than 5000 mg/kg in female mice and determined the extra 10X safety factor for children was not needed.
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