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ISHS Acta Horticulturae 414: International Symposium on the Genus Lilium

LILY DISEASES AND THEIR CONTROL

Authors:   R.H. Lawson, H.T. Hsu
DOI:   10.17660/ActaHortic.1996.414.21
Abstract:
Lily production has increased in recent years with expanding popularity of Asiatic hybrid lilies as garden flowers, cut flowers and pot plants. Several nematode, bacterial and fungus incited diseases have been known for many years. Control of these diseases depends primarily on good sanitary practices and the selective use of chemicals. Recent research has emphasized the importance of breeding for resistance to the fungus Botrytis elliptica by early screening of Asiatic lilies that showed wide variability to infection. Fusarium oxysporum alone or in combination with other fungi causes basal rot, the most serious disease of Asiatic lilies. A method for assessing resistance has been developed and is being used in a breeding program. Detection of viruses remains an important method of control in the absence of genetically engineered resistance and identified virus resistance in breeding programs. Tissue culture combined with chemical treatment has been successfully used to produce virus-free lilies. Oil sprays have been used to reduce transmission of aphid-borne viruses in the field. In this paper we compare the sensitivity of different serological test methods for virus detection. Relationships between aphid transmitted potyviruses in lilies and tulips and detection of viral nucleic acids utilising the polymerase chain reaction are also presented.

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