Biological pest control agents 12 Biological control agents 10 Natural enemies 10 Biological Control 9 Biological control 7 Plant Pests, (New March 2000) 6 Pathogens 5 Pest control 5 Plant pests 5 Biological pest control 4 Insect pests 4 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 4 Predators 4 Animal Ecology 3 Entomopathogens 3 Entomophilic nematodes 3 Mites 3 Mites as biological pest control agents 3 Pests 3 Taxonomy and Evolution 3 Techniques and Methodology 3 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 3 Agricultural entomology 2 Agricultural pests 2 Anatomy and Morphology (Wild Animals), (New March 2000) 2 Arthropod pests 2 Beneficial insects 2 Beneficial organisms 2 Formulations 2 Fungi 2