Scientists have modified feed corn genetically, increasing its resistance to insect pests  Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn  Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed
Ttherefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits
Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops