Parasitism 20 Parasites-- Parasitology 9 Parasitology 8 Parasites 6 Biology 5 Ecology 5 Fungi 4 Botany 3 Mycology 3 Predation 3 parasitism 3 Biomes 2 Entomopathogens 2 Entomophilic nematodes 2 Mutualism 2 Natural enemies 2 Pathogenesis 2 Pathogens 2 Pathogens, Parasites and Infectious Diseases (Wild Animals), (New March 2000) 2 Zoology 2 plant diseases 2 plant parasitism 2 Animal behaviour 1 Animal communication--- Animal Communication 1 Animal parasites 1 Bacteriology 1 Behaviour 1 Behaviour (Wild Animals), (New March 2000) 1 Biodiversity 1 Biological Control 1