subtilis, and Pseudomonas spp. Biological control agents like Paecilomyces lilacinus, Pochonia chlamydosporia, Trichoderma spp., Plectosphaerella cucumeria, Agrobacterium radiobacter, B. This book, management of PPN is a textbook that is geared towards biological pest management of plant parasitic... Plant parasitic nematodes cause an estimated US$100 billion in damage to Agricultural crops worldwide (Oka et al., 2000). Control with nematicides has serious drawbacks including short term management problems and long term environmental problems. have demonstrated potential as control agents for nematodes (Atkins et al., 2002). Although many organisms derive their nutrition from nematodes, the most studied natural enemies of nematodes are bacteria and fungi (Karssen and Moens, 2006). Since the target molecules are dispersed through the soil volume and their precise locations unknown, large volumes of chemicals are applied without encountering target molecules (Akhtar and Malik, 2000).