Biological control 11 Cultural control Biological Control 10 Natural enemies 10 Environmental Pest Management 9 Chemical control 7 Plant Pests, (New March 2000) 7 Plant pests 7 Pest control 6 Insect pests 5 Insects 5 Pesticides and Drugs; Control, (New March 2000) 5 Weed control 5 Weeds 5 Horticultural Crops, (New March 2000) 4 Insect control 4 Nematoda 4 Plant parasitic nematodes 4 Weeds and Noxious Plants 4 Biological control agents 3 Host Resistance and Immunity 3 Integrated Pest Management 3 Life history 3 Nematode control 3 Physical control 3 Plant Ecology 3 Plant diseases 3 Plant pathogens 3 Plant protection 3 Plant viruses 3