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isolation distance

Pat Byrne pbyrne at lamar.colostate.edu
Fri Aug 31 13:00:38 EST 2001

Maize colleagues:

I've been appointed to a Boulder County (Colorado) committee to 
advise on the use of transgenic crops on county-owned Open Space 
land. The county manages a significant part of its open space by 
leasing to farmers for crop production. A major issue will be 
devising guidelines to minimize pollen contamination from transgenic 
corn onto organic corn. I believe the standard USDA isolation 
distance for seed production purposes (660 feet, or 1/8 mile) is 
considered inadequate to meet a 1% contamination threshold. On the 
other hand, a distance being considered in Europe (3 miles, I think) 
seems excessive. I would appreciate any information relevant to this 
issue, including how other communities have dealt with it. (I have 
seen the National Research Council's 2000 report on Genetically 
Modified Pest-Protected Plants). Thanks.

Pat Byrne

Patrick F. Byrne
Assistant Professor
Department of Soil & Crop Sciences
Colorado State University
Ft. Collins, CO 80523
Phone: 970-491-6985     FAX: 970-491-0564
email: pbyrne at lamar.colostate.edu

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