If you want to boycott all grains that have increased in price since last year, or boycott all foods that have increased in price over the past year, you're going to get a bit hungry on that water only fasting diet, merton!
There was a major wheat crop failure in Eastern Europe last year (if I remember it was the winter wheat crop in Russia) - so there goes the surplus and increased demand for the supply. Similar situation with corn - the surplus is going to Bio-Fuels - that has already sparked protests in several countries (think there were about 1-million in Mexico City just 3-5 months ago protesting the 17-cent increase in the price of tortillas).
Another MAJOR factor in the increase of the costs of food is FUEL PRICES ... both to the farmers but also to the truckers (the biggest increase). Again, supply and demand. So - park your car in the garage and break out your bike, or roller blades ... ride the DART to work (I think you said you were in Dallas).
ARRGH ... this is why I didn't want to get started on this ... it's not just one factor.
FWIW: if you buy your flour from WalMart - based on the prices from a few minutes ago - a mixture of bread and ww flour will cost you about 50-cents per pound ... a 1-lb loaf of bread is more than that.
Oh - yeah ... Banquet Beef Pot Pies jumped from 50-cents to 68-cents in just one week!!!