The use of entomopathogenic nematodes can be included in pest management strategies due to their biocontrol potential. Additionally, bacteria, fungi, and actinomycetes possess biocontrol potential against plant-parasitic nematodes. Beneficial Nematodes and Nematode Antagonistic Bioagents is divided into two sections. The first section (chapters 1-16) covers the isolation, identification, molecular characterization, mass multiplication, formulation, and shelf life of bacteria, fungi, and actinomycetes. The second section (chapters 17-24) focuses on the isolation, identification, mass culturing of insect hosts, mass multiplication, formulation, and field potential of entomopathogenic nematodes against economically significant insect pests.