可能有多个有机标示的标准。 但是,美国官方的有机表示-- USDA organic 是禁止转基因的, 请参考

To meet the USDA organic regulations, farmers and processors must show they aren’t using GMOs and that they are protecting their products from contact with prohibited substances, such as GMOs, from farm to table.

来自于

http://blogs.usda.gov/2013/05/17/organic-101-can-gmos-be-used-in-organic-products/

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