Tourism and Travel 80 History 73 Leisure, Recreation and Tourism Economics, (New March 2000) 69 Social Psychology and Social Anthropology, (New March 2000) 69 Tourism 67 Policy and Planning 62 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 Plants 48 Philosophy 45 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 44 Plant Production 40 Plant diseases 40 Taxonomy and Evolution 40 Behaviour 38 Man 37 Natural enemies 36 Plant pathogens 36 Field Crops, (New March 2000) 35 Marketing and Distribution 35 Pest control 35 Taxonomy 35 Insects 34 Management 34 Case studies 33