Nematodes 68 Nematology 53 Nematoda 22 Plant Pests, (New March 2000) 21 Nematoda (Nemata-- roundworms) 19 Plant parasitic nematodes 19 Parasitology 16 Plant pests 15 Natural enemies 14 Insects 13 Pest control 13 Insect pests 12 Plant pathogens 12 Biological control 11 Nematoda (Nemata, roundworms) 11 Plant diseases 11 Plant nematodes 11 Taxonomy 11 Biological Control 10 Entomopathogens 10 Pathogens 10 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 10 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 10 Biological control agents 9 Entomophilic nematodes 9 Fungi 9 Nematode control 9 Parasites 9 Taxonomy and Evolution 8 Agricultural Entomology 7