Traces the historical background of biological control, and argues that more of it is needed - particularly as the mainstay of integrated pest management programmes. Contents: 1. Pests, pesticides and biological control. 2. Natural enemies. 3. Biological control ecology. 4. Early naturalists and experiments. 5. The first foreign explorers. 6. Modern foreign exploration and successes. 7. Maximising biological control through research. 8. Utilization by the public. 9. Other biological methods. 10. Escape from the pesticide dilemma.