Weeds Weeds and Noxious Plants 16 Plant Pests, (New March 2000) 11 Plant pests 11 Biological control 10 Natural enemies 10 Biological Control 9 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 9 Weed control 9 Plant diseases 8 Pest control 7 Plant Ecology 7 Biological control agents 6 Plant Breeding and Genetics 6 Plant Physiology and Biochemistry 6 Arthropod pests 5 Crop Produce 5 Cultural control 5 Insects 5 Plant Production 5 Plant ecology 5 Plant pathogens 5 Chemical control 4 Crop production 4 Crop yield 4 Environmental Pest Management 4 Fungal diseases 4 Fungi 4 Horticultural Crops, (New March 2000) 4 Insect pests 4