1. Introduction 2. Evolution and Biological Control 3. Attributes of Chemical Communications in Nematode Management 4. Host/Prey Specificity and Their Influences on Biopesticides 5. Attributes of Successful Biopesticides 6. Types of Nematode Biopesticides 7. Predaceous Nematodes 8. Microbial Biopesticides 9. Predaceous Soil Invertebrates 10. Predaceous and Parasitic Fungi 11. Antagonistic Plants and Plant Products 12. Biopesticidal Potentials of Neem (Azadirecta indica) 13. Plant and Animal Exudates 14. Biopesticidal Potential of Nanobiopesticides 15. Environmental Benefits and Risks 16. Conclusions: Prospects and Opportunities Bibliography