This book describes entomopathogenic and slug parasitic nematodes as potential biocontrol agents in crop insect and slug pest management. Addressing research on these two nematodes from tropical, subtropical, and temperate countries, it covers the new techniques and major developments regarding mass production, formulation, application, commercialization, and safety measures. Plans for future strategies to make these beneficial nematodes cost-effective and expand their use by including them in integrated pest management programs in different agro-ecosystems are also discussed. provides a comprehensive review of the topic and is an essential resource for researchers, industry practitioners, and advanced students in the fields of biological control and integrated pest management.