Pests 135 Insect pests 74 Educational tests and measurements 62 Entomology 58 Plant Pests, (New March 2000) 58 Psychological tests 54 Plant pests 49 Pest control 46 History 41 Insects 36 Management 33 Biological control 30 Horticultural Crops, (New March 2000) 28 Natural enemies 28 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 28 Plant diseases 27 Biological Control 24 Crop Produce 24 Plant pathogens 24 Taxonomy 24 Plant Breeding and Genetics 23 Safety measures 23 Common weeds 22 Chemical tests and reagents 21 Coconut 21 Commercial Production 21 Diseases Coconut 21 Food Products 21 Insect control 21 Meat 21