1. Corn: Our number-one agricultural commodity. In 2000, 79.5 million acres of harvested cropland in the U.S. were corn, 25% of which was genetically engineered. This includes Bt and Roundup Ready corn varieties.
2. Soy: The number-two U.S. agricultural commodity. Sixty percent of processed foods contain soy ingredients, and 82% of edible fats and oils consumed in the U.S. are soy-based. In 2000, 54% of the 74.5 million acres of soybeans grown in the U.S. was Roundup Ready soy.
3. Potato: Currently, the only GE potato is a Burbank Russet variety, marketed under the name NewLeaf. This Bt-producing plant is lethal to the Colorado potato beetle – and possibly to beneficial insects.
4. Tomato: The first GE tomato, the Flavr Savr, was introduced commercially in 1994, but flopped because it proved tasteless. Since then, other varieties, including a cherry tomato, have been genetically engineered to delay ripening and extend shelf life.
5. Canola: Of the 15 million acres of canola grown in the U.S. and Canada annually, 35% is GE, mostly for herbicide-resistance.
6. Cottonseed Oil: In 2000, 61% of the 15.5 million acres of cotton grown in the U.S. was genetically engineered. Every year, half a million tons of cottonseed oil makes its way into salad dressings, baked goods and snack foods. About 1.4 million tons of cottonseed meal is fed to livestock annually.
7. Papaya: More than one third of Hawaiian papayas have been genetically engineered to withstand the papaya ringspot virus. Organic papaya growers in Hawaii worry that the pollen from GE papaya trees will contaminate their crops.
8. Radicchio: Currently one variety of radicchio, called Seed Link, has been genetically engineered to be resistant to the herbicide glufosinate.
9. Squash: Several varieties of summer squash have been genetically engineered to resist mosaic viruses. Some scientists are concerned that resistance to the virus may spread to weedy relatives, such as gourds, found in the U.S., creating invasive superweeds.
10. Salmon: A company called Aqua Bounty has engineered a salmon with genes from two different fish species so that it grows much more quickly than non-GE salmon. The company now seeks FDA approval to market this fish for human consumption. Escaped into the environment, (which is inevitable on fish farms), the GE fish may be larger and more aggressive, eat more food, and mate more often, though their offspring are less fit to survive in the wild, raising the possibility of wild species extinction. Human health effects are also relatively unknown. Currently, research on transgenic strains of 35 fish species world-wide is underway.