Techniques and Methodology Methodology 19 Techniques 12 Research 8 Natural enemies 7 Man 6 Plant Pests, (New March 2000) 6 Plant pests 6 Analytical methods 5 Biological Control 5 Chemical composition 5 Mathematics and Statistics 5 Tourism and Travel 5 Agricultural Economics 4 Biological control 4 Diagnosis 4 Environmental impact 4 Genetics and Molecular Biology of Microorganisms, (New March 2000) 4 Human diseases 4 Natural resources 4 Nutrition 4 Pesticides and Drugs; Control, (New March 2000) 4 Phosphorus 4 Physiology of Human Nutrition 4 Policy and Planning 4 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 4 Ruminants 4 Taxonomy 4 Taxonomy and Evolution 4 Tourism 4