The availability of genetically engineered com hybrids that are resistant to insect pests is an exciting development for com producers and the entire com industry. These hybrids are likely to become very popular as they continue to demonstrate dependable insect protection and yield performance. But these hybrids have other advantages as well. Because of the relationship between com insects, particularly the European com borer, and certain diseases, Bt hybrids have shown reduced levels of these diseases in side-by-side comparisons.