Weed Science 66 Agronomy 58 Nature (Journal) 57 Weed control 54 Weeds 48 Weed management 44 Weed science 35 Economics and politics 33 WEED MANAGEMENT 32 Pests 27 WEED CONTROL 24 Economic &Political Weekly 23 Plant diseases 23 Common weeds 22 Safety measures 22 Plant Pests, (New March 2000) 20 weed control 20 Pathogen, Pest, Parasite and Weed Management (General) 19 Plant pests 19 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 18 History 17 Weeds and Noxious Plants 17 Pest control 16 Plant Breeding and Genetics 16 Taxonomy 16 Aquatic weeds 15 Economics 15 HERBICIDES 15 Weed Control 15 Herbicides 14