Biological control 78 Biological Control 37 Natural enemies 37 Pest control 32 biological control 24 Biological control agents 23 Plant Pests, (New March 2000) 22 Plant pests 20 Insect pests 16 Biological control of pests--agriculture-- Pest control 15 Plant pathogens 14 Pathogens 13 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 13 Chemical control 12 Taxonomy 12 Taxonomy and Evolution 12 Cultural control 11 Environmental Pest Management 11 Insects 11 Plant diseases 11 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 11 Weeds 11 Entomopathogens 10 Insecticides 10 Pesticides and Drugs; Control, (New March 2000) 10 Animal Ecology 9 Fungi 9 Insect control 9 Insect fossils 9 Integrated Pest Management 9