Plant pathogens 57 Plant diseases 42 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 37 Plant Pests, (New March 2000) 35 Plant pathology 34 Microbiology 32 Plant Pathology 30 Natural enemies 28 Pathogens 28 Plant pests 28 Taxonomy 27 Pest control 26 Fungi 25 Biological Control 22 Biological control 22 Taxonomy and Evolution 22 Horticultural Crops, (New March 2000) 21 Insects 21 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 21 Biological control agents 19 Epidemiology 19 Pathogen, Pest, Parasite and Weed Management (General) 19 Plant Breeding and Genetics 19 Plant disease control 19 Crop Produce 16 Insect pests 16 Molecular biology 16 Plants 16 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 16 Host Resistance and Immunity 15