The diseases of horticultural crops not only reduce the productive capability but also adversely affect the quality with the changing climate, horticultural crops have become vulnerable to hazards of plants and diseases, playing a major role in causing threat to food security. The present book deals with horticultural plants, diseases of horticultural crops, green – house horticultural plant diseases and their control, biological pest control measures, managing diseases and pests in home vegetable gardens, methods for managing crop diseases, nature of resistance in disease and protection of the crop plants. This book will cater the needs of students, teachers, researchers of plant pathology, horticulture, seed companies and growers who want to identify and manage diseases.