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Unapproved genetically-modified rice trials in U.S.





Unapproved genetically-modified rice trials in U.S. have contaminated the world’s rice supply

GM rice had not been exposed and reported to the public. The field trial was found to be contaminated.  Many countries took action on imposing ban of US rice or on imposing a strict certification and testing on all rice import.


During 2006 and 2007 traces of three varieties of unapproved GM rice owned by Bayer CropScience were found in US rice exports in over 30 countries worldwide. At the time of discovery only one of the contaminating varieties (LLRICE62) had approval for cultivation in the US, the other two varieties (LLRICE601 and LLRICE604) had not. None of the contaminating varieties had approval for cultivation or consumption anywhere else in the world.

No GM rice has ever been grown commercially in the US and the source of the contamination is believed to be field trials of herbicide tolerant rice conducted between the mid-1990s and early-2000s by Bayer CropScience (or its precursor companies Aventis CropScience and AgrEvo). Bayer abandoned these trials in 2002. Despite two of their rice varieties, (LLRICE06 and LLRICE62) receiving deregulated status in 2002, none of Bayer’s GM rice varieties have ever been placed on the market US. The USDA official report into the incident identified the field trials as the source of contamination but was unable to decide whether gene flow (cross pollination) or mechanical mixing was the mechanism responsible for the contamination.



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