Agricultural Economics 6 Horticultural Economics, (New March 2000) 6 Horticultural Crops, (New March 2000) 3 Plant Production 3 Plant diseases 3 Plant pathogens 3 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 3 Agricultural policy 2 Crop Produce 2 Food Economics, (New March 2000) 2 International Trade 2 Other Control Measures 2 Plant Breeding and Genetics 2 Plant Pests, (New March 2000) 2 Plant disease control 2 Plant pests 2 Policy and Planning 2 Quarantine 2 Socioeconomics 2 Taxonomy 2 Taxonomy and Evolution 2 Agencies and Organizations 1 Agricultural development 1 Agricultural economics 1 Agricultural entomology 1 Agricultural industries 1 Agricultural production 1 Agricultural products 1 Agricultural research 1 Agricultural situation 1