from
http://responsibletechnology.org/buy-non-gmo/non-gmo-seed
"Currently commercialized GM crops in the U.S. include soy (94%), cotton (90%), canola (90%), sugar beets (95%), corn (88%), Hawaiian papaya (more than 50%), zucchini and yellow squash (over 24,000 acres). (Number in parentheses represents the estimated percent that is genetically modified.) Blue corn cross-pollinates with current GM corn varieties. And now, with the sugar beet growers going GM, there is the possibility of cross-pollination into other beet varieties and near relatives, such as chard. All but soy cross-pollinates."
Responsibletechnology.org is the best site I have found for information on GMO's.
Sugar from cane, not beet, is safe, but they are working on GMO sugar cane (and who knows what else)
Blue corn has previously been listed as safe, but as there is cross pollination with GMO corn, it is no longer safe, and soon there may be no corn that is safe. There has to be an area at least 6 miles from any GMO corn to be sure it is GMO free now, since this is the distance bees normally travel. As GMO corn crosses with non GMO corn that is too close, it will put more non GMO corn at risk. Soon there will be no corn that is truly GMO free for anything unless they are growing it in a contained environment.
Any plant listed as being grown with GMO has to be heirloom seeds (or certified non GMO) to be safe.
Also, when buying things in the store, be aware of anything made with those products. IE canola oil, corn flour, corn meal, corn starch, soy isolates, etc.
Keep in mind that beef, chicken, fish (farm grown) eggs, Milk, cheese, etc come from living things that are fed corn, so unless it states that it is certified non GMO it's best to assume that they are contaminated.
Wheat is not listed, but they HAVE found, is GMO wheat in fields. Monsanto denies having altered wheat but I now grow my own wheat and also buy organic/certified non GMO.
Pay no attention to the word "natural" on things. Pure poison can be listed as 'natural'. It means nothing as far as safety. Certified organic and certified non GMO are what to look for when shopping for anything.