Abstract
The author presents a considerable list of insects which have developed field resistance to insecticides and discusses the following phases of the subject the origin, inheritance, development, and stability of resistance; the cross tolerance of resistant insects; morphological, biological and behavioristic factors associated with resistance; the biochemistry of resistance to HCN, DDT, lindane, toxaphene, and chlordane; synergists for DDT-resistant flies; feasible control of resistant insects.