This third volume of the 4-volume set focuses on the diseases prevalent in ornamental plants and spice crops. The management of any disease successfully involves its detailed study regarding symptoms, causal agent, disease cycle, and epidemiology. To address this, the authors in this volume, all nationally known scientists in their respective fields who are engaged in teaching, research, and extension services, have contributed their experience and knowledge on recent developments in the field of plant diseases. Focusing on ornamental plants (such as carnations, chrysanthemums [or crown daisies], dahlias, gladioli, marigolds, roses, zinnias), and spice crops (such as black pepper, coriander, ginger, turmeric, and others), the authors offer detailed accounts of the main diseases affecting these plants. Included are introductions to the plants, disease symptoms, causal organisms, disease cycles, epidemiology, and management of the diseases of these economically important crops. The volumes provide an abundance of information for understanding and managing plant diseases, with emphasis on diagnostic techniques. The collection includes: Volume 1: Fruit Crops Volume 2: Vegetable Crops Volume 3: Ornamental Plants and Spice Crops Volume 4: Important Plantation Crops, Medicinal Crops, and Mushrooms