In North America, there are 36 species of insects that cause damage to soybean, Glycine max (L.) (Merr.), but only 8 of these are of major importance. With I exception, these 8 insect species occur primarily in the Delta States, Southeast, and Appalachia farm production regions, where 74% of all insecticides applied to soybean are used. The resistance of soybean to insect damage is primarily, if not exclusively, the results of antibioses. Little is known about the inheritance of insect resistance in soybean. Current knowledge suggests that progress in breeding for insect resistance would be best obtained by treating resistance as a quantitative trait. The primary breeding problem in developing insect resistance continues to be maintaining resistance levels equal to the donor parent and achieving yields equal to that of existing cultivars.