Ann E. Hajek is a Professor in the Department of Entomology at Cornell University, New York. Her career has focused on biological control, with research ranging from developing biopesticides to investigating why epizootics of insect diseases occur. The International Organization for Biological Control, Nearctic Regional Section, presented her with their Distinguished Scientist Award in 2011.

Preface; Acknowledgements; Part I. Introduction: 1. Why use natural enemies?; 2. Introduction to biological control; Part II. Strategies for Using Natural Enemies: 3. Classical biological control; 4. Augmentation: inundative and inoculative biological control; 5. Conservation and enhancement of natural enemies; Part III. Biological Control of Invertebrate and Vertebrate Pests: 6. Ecological basis for use of predators, parasitoids, and pathogens to control pests; 7. Predators; 8. Insect parasitoids: attack by aliens; 9. Parasitic nematodes; Part IV. Microbial Pathogens of Invertebrates and Vertebrates: 10. Bacterial pathogens of invertebrates; 11. Viral pathogens of invertebrates and vertebrates; 12. Fungal pathogens of invertebrates; Part V. Biological Control of Weeds: 13. Biology and ecology of herbivores used for biological control of weeds; 14. Phytophagous invertebrates and vertebrates; 15. Plant pathogens for controlling weeds; Part VI. Biological Control of Plant Pathogens and Plant Parasitic Nematodes: 16. Biology and ecology of microorganisms for control of plant diseases; 17. Microbial antagonists combating plant pathogens and plant parasitic nematodes; Part VII. Biological Control: Concerns, Changes and Challenges: 18. Making biological control safe; 19. Biological control as part of integrated pest management; 20. Our changing world: moving forward; Glossary; References; Index.