Epidemiology 10 Plant diseases Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 8 Plant pathogens 6 Horticultural Crops, (New March 2000) 5 Plant disease control 5 Disease resistance 4 Pathogen, Pest, Parasite and Weed Management (General) 4 Plant pathogenic bacteria 4 Taxonomy 4 Geographical distribution 3 Host Resistance and Immunity 3 Plant pathology 3 Taxonomy and Evolution 3 Biological Resources (General) 2 Crop Produce 2 Fungal diseases 2 Fungi 2 Genetically engineered organisms 2 Insect control 2 Insect pests 2 Insects 2 Microbial Ecology, (New March 2000) 2 Orchards 2 Pest control 2 Phytoplasma 2 Plant Breeding and Genetics 2 Plant Pests, (New March 2000) 2 Plant pathogenic fungi 2 Plant pests 2