Discusses how to identify and develop plant materials with resistance to insect pests. Covers terminology and categories of resistance, and presents techniques for studying plant resistance. Also gives consideration to potentially resistant material. Examines the molecular biology and genetics of insect resistance in crop plants, and insect genes capable of overcoming resistance to form insect biophytes. The closing chapter presents hitherto unpublished information on the use of transgenic plants with insect resistance and assesses the ways that insect resistant cultivars work with other management techniques to suppress insect populations.