include more than 160 species of annual and perennial flowers. Virus Diseases of the Chrysanthemum Philip Brierley For more than 50 years florists have grown chrysanthemums in atelythe green- house as potted plants and as cut flow- ers for autumn bloom, and amateurs ously have grown them as garden perennials. Chrysanthemum morifolium. Chrysanthemum indicum, or Ye Ju Hua, and Chrysanthemum moriflorum, Ju Hua, have a long history for the treatment of inflammation, hypertension, and respiratory diseases in traditional Chinese and Korean medicine. Chrysanthemum. ): When this disease occurs lower leaves turn yellow and wilt, followed by overall plant wilting and death of entire plant. People use it to treat respiratory problems, high blood pressure, and hyperthyroidism. Although traditionally used in tea preparations, other preparations include tinctures, creams, and lotions. Chrysanthemum plants were co-infected with the two viroids and placed either into control environmental conditions or into mutagenic conditions (UV-irradiated 10 minutes/day with 2J/cm 2, a dose known to induce intramolecular cross-linking in viroid molecules while still minimizing the impact on plant growth). The florists chrysanthemums (C. x grandiflourm) are the most common and hardy in … Chrysanthemum stunt viroid (CSV) This disease is highly infectious and can cause serious losses in chrysanthemum crops. Chrysanthemum has been used for hundreds of years in Chinese medicine. Diseases of Chrysanthemum sp.. Garden Mum Diseases. CSVd symptoms are variable and dependent on cultivar, light and temperature. Fusarium Wilt (fungus – Fusarium spp. Chrysanthemum sp. Any plant producing abnormality of form or a streakiness of colour in the bloom is suspect. Chrysanthemum Mosaic. Lower portion of stem near soil line turns dark brown-to-black with brown discoloration in vascular tissues. chrysanthemi Symptoms Initial symptoms are in the form of yellowing and browning of leaves. The symptoms, caused by a virus, are not seen until the flowers open. Diseases of Chrysanthemum Wilt -Fusarium oxysporum f.sp. CSVd is probably distributed world-wide where chrysanthemums are grown. The case for describing florists' chrysanthemums as Dendranthema cultivars. Symptoms. Mums (Chrysanthemum spp.) (Shasta daisy) can get Alternaria leaf spot that causes concentric rings of light and dark. Contact Dermatitis 1985;13(2):115-119. Botrytis may cause flowers to brown and die early as well as cause irregular brown spots on leaves and shoots. The natural host range of CSVd includes Chrysanthemum and Petunia. This disease has recently assumed serious proportions. 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