Plant pathology 337 Diseases 245 Plant diseases 235 Medicine 201 Fiscal policy 145 Plant disease 140 Pathology 127 Microbiology 119 Economics 62 Epidemiology 59 Disease 55 Fishes-diseases 51 AIDS (Disease) 50 Communicable diseases 49 Plant Pathology 49 plant disease 47 Immunology 46 Biochemistry 45 Viruses 45 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 44 Agriculture 43 Health, Mind & Body 42 Soil chemistry 42 Disorders & Diseases 41 Plant pathogens 41 plant pathology 40 Immunity 39 Nutrition 39 Public health 39 Biotechnology 38