Flower growing has emerged as a valuable venture in the floriculture industry. A marvelous progress has been registered world over, as these flowers are highly demanded in the world trade. In order to harness the full advantage out of this business, the farmers, entrepreneurs have boosted their production for quality and export oriented flowers. The outbreak of diseases of economic importance has been observed from various countries, which now has become a major bottleneck in flourishing of this lucrative venture. Thus to sustain the supply of flowers in national and international markets a healthy crop and quality flowers are needed. The book has been formulated to cover various interested workers like scientists, farmers, entrepreneurs, extension workers and students in diagnosing and managing diseases effectively. The book provides the diagnosis guidelines in quick identifying the diseases on symptom bases and suggestive control measures for adoption immediately with the outbreak of diseases based on the authentic information and our long experience in dealing with ornamental diseases.