Biological Control 4 Biological control 4 Chemical control 4 Natural enemies 4 Physical control Cultural control 3 Environmental Pest Management 3 Pesticides and Drugs; Control, (New March 2000) 3 Taxonomy 3 Taxonomy and Evolution 3 Weed control 3 Weeds 3 Fungal diseases 2 Fungi 2 Genetics 2 Geographical distribution 2 Integrated Pest Management 2 Integrated control 2 Other Control Measures 2 Plant Breeding and Genetics 2 Plant Ecology 2 Plant disease control 2 Plant diseases 2 Plant ecology 2 Plant pathogenic fungi 2 Plant pathogens 2 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 2 Weeds and Noxious Plants 2 Adaptation 1 Aetiology 1