Journal Article 187 Causal Agent 139 Viruses and viroids 139 Subject Areas 125 Crop Type 111 Pathogen detection 92 viruses and viroids 48 mehr ... Vegetables 30 Fruit 25 Field crops 24 tree fruits 24 Ornamentals 23 herbaceous/flowering plants 17 pathogen detection 17 Epidemiology 16 disease development and spread 13 Etiology 12 field crops 12 Pathogen diversity 10 disease management 10 pathogen diversity 10 vegetables 9 Tropical plants 8 cereals and grains 8 oilseeds and legumes 8 other 8 epidemiology 7 small fruits 7 Disease management 6 Trees 6 weniger ...