Tourism and Travel 80 Leisure, Recreation and Tourism Economics, (New March 2000) 69 Social Psychology and Social Anthropology, (New March 2000) 69 Policy and Planning 62 Tourism 61 Natural Resource Economics, (New March 2000) 58 Plant Pests, (New March 2000) 58 Sustainability 58 Plant Breeding and Genetics 55 Plant pests 49 Agricultural Economics 48 Horticultural Crops, (New March 2000) 48 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 44 Plants 43 Biochemistry-- Biology 41 History 41 Plant Production 40 Plant diseases 40 Taxonomy and Evolution 40 Behaviour 38 Man 37 Plant pathogens 36 Case studies 35 Field Crops, (New March 2000) 35 Marketing and Distribution 35 Natural enemies 35 Pest control 35 Taxonomy 35 Insects 34 Molecular Biology and Molecular Genetics, (Discontinued March 2000, Reinstated and Revised June 2002) 33