Dissertations, Academic (Ph.D) 27 Biological control agents 23 Natural enemies 23 Biological Control 21 Biological control 20 Antineoplastic agents 16 Agent (Philosophy) 15 Thesis (Ph.D)-Biochemistry 15 Plant Pests, (New March 2000) 14 Plant pests 13 Biological pest control agents 12 Pathogens 12 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 12 Intelligent agents (Computer software) 11 Pest control 11 Entomopathogens 10 Antibacterial agents 9 Plant pathogens 9 Surface active agents 9 Anti-Bacterial Agents 8 Anti-Infective Agents 8 Artificial intelligence 8 Insect pests 8 Pesticides and Drugs; Control, (New March 2000) 8 Taxonomy 8 Taxonomy and Evolution 8 Entomophilic nematodes 7 Plant diseases 7 Predators 7 Travel agents 7