1.   But biotech corn, like corn genetically engineered to produce the insecticide Bt, is imported into Mexico for use in food and appears to be illegally planted.

2.   Caught in the middle are American farmers, who have rushed to plant the biotech corn, soy and other crops in the last four years.

3.   Several scientists, however, say they were told the conference could help influence the decision by the Environmental Protection Agency on biotech Bt corn.

4.   The Austrian-born farm leader backs a plan to label all raw materials or products containing biotech corn or soybeans imported into and processed in the EU.

5.   While not approved for planting, biotech corn is legally imported into Mexico for use in food.

6.   Other varieties of biotech corn digest more quickly, and the government says they pose no health risk.

7.   A Cornell University study released last year raised concerns about biotech corn after finding that the pollen was toxic to Monarchs in the laboratory.

8.   A variety of biotech corn not approved for food use prompted nationwide recalls of taco shells in September and October.

9.   Azteca is investigating the incidents and has implemented testing procedures to prevent the biotech corn from reaching its mills, said company spokeswoman Sarah Wright.