Orchards Fruits 6 Horticultural Crops, (New March 2000) 4 Plant disease control 4 Plant diseases 4 Apples 3 Crop Produce 3 Crop production 3 Cultivars 3 Food Processing (General) 3 Malus 3 Pathogen, Pest, Parasite and Weed Management (General) 3 Pest control 3 Plant Breeding and Genetics 3 Plant Pests, (New March 2000) 3 Plant Production 3 Plant pathogens 3 Plant pests 3 Rootstocks 3 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 3 Economics 2 Epidemiology 2 Fertilizers and other Amendments 2 Food Composition and Quality 2 Genetically engineered organisms 2 Harvesting 2 Malus pumila 2 Organic farming 2 Pears 2 Plant Nutrition 2