Plant protection Plant Pests, (New March 2000) 10 Pest control 9 Plant pests 9 Plant diseases 7 Insect pests 6 Insects 6 Plant Breeding and Genetics 6 Plant Production 6 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 6 Crop Produce 5 Crop production 5 Horticultural Crops, (New March 2000) 5 Plant Physiology and Biochemistry 5 Plant disease control 5 Plant pathogens 5 Biological Control 4 Biological control 4 Fertilizers and other Amendments 4 Food Composition and Quality 4 Insect control 4 Irrigation 4 Natural enemies 4 Pathogen, Pest, Parasite and Weed Management (General) 4 Plant breeding 4 Taxonomy 4 Agricultural Economics 3 Agricultural entomology 3 Arthropod pests 3 Biotechnology 3