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Amaryllis and Hippeastrum01. Amaryllis and Hippeastrum Introduction 02. Morphology and Classification of Amaryllis 03. Different classification of Amaryllis 04. Various species and cultivars of amaryllis and hippeastrum 05. Important cultivars of Hippeastrum Hybridum 06. Breeding and hybridization of Amaryllis 07. Hybridization of Amaryllis plants 08. Propagation of Amaryllis Plants and Hippeastrum 09. Micro propagation and stem sections of amaryllis and Hippeastrum 10. Cultivation and growth of Amaryllis and Hippeastrum 11. Growth and Flowering of Amaryllis and Hippeastrum plants 12. Diseases of Amaryllis and Hippeastrum 13. Viral diseases of Amaryllis and Hippeastrum 14. Pests attacking Amaryllis and Hippeastrum 15. Harvesting of Amaryllis bulbs and Hippeastrum bulbs/flowers Other agricultural and environmental articles for education How to build greenhouseArticle on greenhouse technology and explains how to build a greenhouse, Size of the Greenhouse, Structural Details, Sit... You are reading article on Amaryllis and Hippeastrum Diseases affecting Amaryllis and Hippeastrum plantsAmaryllis and Hippeastrum are attacked by several diseases and pests which cause extensive damage to the plants and bulbs during storage. DiseasesThe various fungal and viral diseases that attack the Amaryllis and Hippeastrum are mentioned here. Fungal diseasesThese flowers are attacked by some fungal diseases. They are discussed here in detail. Red leaf spot diseaseStagnospora curtisi is the causal organism for this disease Symptoms: The disease appears in the form of spots on the leaves which ultimately turn yellow and fall-off. Control: The diseases may be controlled by spraying with 0.75% Copper oxychloride or by warm water treatment of bulb at 43.5OC for 2 hours. In Amaryllis. application of Zineb and Ferbam @ 2lb/l00 gal. is more effective in con trolling the fungus than Captan or/ and copper fungicides. The combination of hot water treatment + 0.5% Benlate dip to control the diseases. In field trials, a dip containing 1 % Aaglitom and 0.2 % Benlate was also effective. Other fungal diseasesOther fungal diseases of Amaryllis are soft rot of bulbs caused by Rhizopus stolonifer, bulb decay caused by sclerotium rolfsii, greymold caused by Botrytis cinerae, root rot caused by Rythium debaryanum, black mildew caused by Asterinella hippeastri, leaf spot caused by Cercospora amaryllidis, brown leaf spot caused by Accidium amaryllidis and anthracnose caused by Septogloeum amaryllidis. These diseases can also be controlled by treatments suggested to control the red leaf spot of amaryllis. Phoma glomerata, Helminthosporium rostratum and Fusarium spp also adversely affect the growth, bulb formation and flower in hippeastrum. Next : Viral diseases of Amaryllis and Hippeastrum Previous : Growth and Flowering of Amaryllis and Hippeastrum plants |
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