Biological control agents Natural enemies 23 Biological Control 21 Biological control 17 Plant Pests, (New March 2000) 14 Plant pests 13 Pathogens 12 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 12 Pest control 11 Entomopathogens 10 Plant pathogens 8 Taxonomy 8 Taxonomy and Evolution 8 Entomophilic nematodes 7 Insect pests 7 Plant diseases 7 Predators 7 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 7 Animal Ecology 6 Insects 6 Weeds 6 Weeds and Noxious Plants 6 Arthropod pests 5 Biological pest control agents 5 Fungi 5 Insect control 5 Nematoda 5 Behaviour 4 Behaviour (Wild Animals), (New March 2000) 4 Chemical control 4