Nematoda 30 Nematoda (Nemata-- roundworms) 24 Plant Pests, (New March 2000) 16 Plant parasitic nematodes 15 Nematoda (Nemata, roundworms) 12 Plant pests 12 Insects 10 Pest control 10 Taxonomy 10 Taxonomy and Evolution 9 Insect pests 8 Natural enemies 8 Nematode control 8 Plant pathogens 8 Biological Control 7 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 7 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 7 Animal Ecology 6 Biological control 6 Horticultural Crops, (New March 2000) 6 Plant diseases 6 Biological control agents 5 Chemical control 5 Entomopathogens 5 Fungi 5 Parasites 5 Pathogens 5 Plant Breeding and Genetics 5 Plant pathogenic fungi 5 Plant viruses 5