This color diagnostic guidebook is a thorough, authoritative, and practical reference for anyone who needs to diagnose and manage disease problems in brassica crops destined for vegetable markets, seeds, oil, and condiments. Fifty-nine international disease experts contributed to the coverage of more than a dozen brassica crops: Cabbage, Cauliflower, Broccoli, Brussels Sprouts, Kohlrabi, Greens, Asian Mustard Greens, Chinese Broccoli (Chinese Kale), Chinese Cabbage, Horseradish, Radish, Turnip, Rutabaga, Oilseed Rape (Canola, Rapeseed), and Culinary or Condiment Mustards. The book covers diseases caused by fungi, bacteria, mollicutes, viruses, and nematodes, as well as noninfectious damage to brassica crops such as herbicide injury, nutrient deficiencies, postharvest disorders, genetic abnormalities, and environmental damage. Plant pathologist-reviewed color photographs provide diagnostic guidance, and current approaches to disease management are provided at the end of each section.