Biological Control Natural enemies 33 Biological control 29 Biological control agents 21 Plant Pests, (New March 2000) 20 Plant pests 18 Pest control 17 Chemical control 12 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 12 Taxonomy 12 Taxonomy and Evolution 12 Environmental Pest Management 11 Insect pests 11 Insects 11 Pathogens 11 Plant pathogens 11 Cultural control 10 Pesticides and Drugs; Control, (New March 2000) 10 Plant diseases 10 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 10 Entomopathogens 9 Integrated Pest Management 9 Weeds 9 Animal Ecology 8 Fungi 8 Horticultural Crops, (New March 2000) 8 Insect control 8 Predators 8 Weeds and Noxious Plants 8 Arthropod pests 7