• Research in Plant Disease
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• v.9 no.4
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• pp.237-241
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• 2003

Damages caused by infection with Cucumber mosaic virus (CMV), Lily mottle virus (LMoV) and Lily symptomless virus (LSV) were assessed by comparing growth of plants produced from seeds of Lilium x fomolongi cultivar 'Noesan' both infected and free from infection with those viruses. Symptoms and infection rate were investigated in field-grown lily.Dominant viral infection symptom in the field was mottle on leaves, caused by natural infection with LMoV. Incidence of viral disease caused by mixed infection with two of LMoV, CMV and LSV in field-grown Lilium x fomolongi cultivars, reused for more than 6 years consecutively, was 80 percent. In comparison with healthy Lilium x fomolongi cultivar 'Noesan', plants doubly infected with CMV-Li1 and LMoV-Li diminished their plant height by 14 percent, fresh weight by 38 percent, and flower length by 15 percent. Lily plants singly infected with CMV-Li1 or LMoV-Li significantly reduced their freish weight by 21.8% and 28.4% compared to healthy plants, respectively.